Excellent Cooler

Strengths:

220 mm speed adjustable fan, dead quiet even on fastest setting
noticed 10 degree drop in temps on low speed setting, laptop fan never went to high speed.
Anti slip rubber strip keeps laptop in place
additional usb ports so you don't loose connection capability
lightweight, height adjustable, great for 17" laptops
ac adapter available
fit into my swiss gear laptop bag

Weaknesses:

only a couple hundred rpm difference between highest and lowest fan speeds

Summary:

Overall an excellent cooler, has enough usb connections so you don't loose any capability. Super quiet 220 mm fan keeps laptop running cool. Large enough to fit a 17" laptop and still be packed into a laptop bag although it is a tight fit. Additional ac adapter available so you don't have to draw power from the laptop. High quality build from Zalman. Might be more expensive than some but worth it. Not a lot of bling, just great functionality.