Good sensor, customizable weighting. Attractive design.

Dreaded Corsair double-click issue.

I have owned two of these. First one developed the double click issue and I thought maybe I just wore it out. Bought the second one and after less than a year, it happened again. Random double clicking for no reason whatsoever. My searches online showed I was not the only one with the problem, and that repeated firmware updates form Corsair have done nothing to fix the issue. I love Corsair products, but cannot recommend this or any other Corsair mice, as it seems this isn’t just limited to the M65, but most of their mice.

Overall, it's quite nice to use. It accommodates large hands like mine decently well. I have all of the weights in because I prefer a heavier click. The thumb rest is something I've grown fond of. I've not owned a mouse with extra buttons or adjustable DPI before, so it's hard for me to accurately compare these features against comparable equivalents in the price bracket.

The notoriously frequent left click issue speaks to QC issues over time on this model. Thankfully, there's an easy fix I'll include here for others struggling with this mouse.

My left click started failing after 20 months of heavy daily use. I very nearly bothered with the IPR warranty until I realized how easy of a fix this was. To fix the issue, you'll need a micro/electronics screwdriver bit set, some dry lube safe for electronics, and about five minutes of your time. 1. On the bottom of the mouse are two screw access ports next to the rear weight. Remove those with a small Phillips and keep safe. 2. Pop the top/lid of the mouse off with gentle upward pressure pushing backwards. Move to the side and examine the interface. 3. Some models have wires that needlessly rub / interfere with the click sensors and/or scroll wheel. Tuck those out of the way if necessary. 4. Grab your dry lube spray and apply sparingly to the click actuator contact points and scroll wheel assembly. Be sure not to spray the middle mouse wheel itself. 5. Re-mount the top of the mouse by securing the lid at the rear and roughly getting the clickers where they need to be. 6. Replace the two Phillips screws by cradling the body/center of the mouse upside down in your non-dominant hand. 7. Before plugging the mouse back in, carefully check the click action to ensure the top lid of the mouse is where it is supposed to be front and rear. 8. You may need to go through steps 5-7 again depending on your luck. 9. Click to your heart's content on your newly serviced mouse. It may briefly stick while the lube gets into the actuator.

Mouse is barely a year old and the left click button failed. Basically, it picks up 80% of the clicks and then fails to pick up the remaining 20%. This creates an incredibly frustrating experience while using the mouse as you won't know when it's about to fail.

I had the exact same mouse for >5 years and only replaced it with the one that failed because the original was looking really worn. In comparison, I have a mouse that I got for free with a gaming laptop well over 12 years ago now. The gaming laptop has long since been retired, but the mouse lives on. Completely unacceptable to have a mouse fail in year like this, especially for a $60 mouse. Stupidly, I bought the same mouse again without reading the reviews, and now I wonder how long this third one will last...

Left click mostly doesn't work after 2 years of hardly using it.

Everything!!!. I have had this mouse for about 3 years and have never had an issue. It just works flawlessly. I am on the computer 10 to 12 hours a day and I use the mouse for Gaming, and Office apps. For anyone who uses Adobe Photoshop, you know you do a lot of clicking. I am in adobe almost every day. This mouse is without a doubt one of the best I have ever had. I cannot find any faults with this product, so I don't understand all the negative reviews. Unless Corsair has dropped their quality on this product, I would most definitely buy this mouse again.

I cannot find any in the three years I have had this mouse.

As I said in my previous statement, I would not hesitate to buy this mouse again. It is an awesome gaming mouse.

Lights, looks.

Everything else. Buttons are bad, scroll wheel is not good, middle button broke in a year for me, left click either skips a click or double clicks. Don't waste your money. Very disappointed in Corsair. Won't buy again.

Ultimately disappointed in Corsair's quality control for a $90 mouse. I love their products usually but will not purchase them from now on.

The Short story - Left click button failure. Common issue. The long story - Wish I did my research first because I would have quickly found that these mice have an issue with the left mouse. Mine never did to double click which seems to be common but I can here it click and not register. Super frustrating regardless of what you're doing. I got three of these mice so I don't have to move them to different locations and 2 of them are acting up. Found a youtube video of a guy that takes the mouse apart and cleans the contacts in the button. So i tried it and successfully got the mouse to work again... for now. Amazon has replacement switches 6 for 5 dollars but requires you be skilled with a soldering gun. I will be doing this because im tired of paying good money for a product that clearly is not. Maybe ill make a youtube video on button replacement if not done all ready. What did I learn form this. Do my research on products from various sources before making purchases. I give it 1 star for quality of the parts 5 stars for how the mouse feels. Really like the layout and button arrangement.

Good ergonomics

The main left clicker starts to skip clicks or give you extra clicks after about 6 months. The issue has occurred on two of them after I purchased a second one. I made certain to baby the second one, duct taping the cord to the desk so it does not fall on the ground accidentally. Did not change the outcome of the mouse, the clicker is busted after 6 months.

This exact same thing has happened to two of them already. Avoid at all costs, not worth ~$80- $90 if it is broken in 6 months. You could get a better mouse for half the price.

After almost a year of using the left click stop working.

- Adjustable DPI - Weight Adjustment - Feel - Look

None thus far, the application can be a bit daunting is about the only weakness but does work.

It's a great mouse for it's price point. It works very well. I have had mine now for a while and still works great!