I dried the lower-end class APs from DLink, but this AP work better compared to others - more uptime. The PoE is a powerful features, but not necessarily something worth investing in unless you need the option.
The AP will drop clients usually when they do constant traffic. Sometimes connection drops when talking on Skype for 30 mins. When copying large files - heavy traffic, the AP will drop you, but it will recover - no AP restart needed. IPv4 only. The transfer rate is small - about 1-3MBps. Will not scale to more even if adjusting transmission power or the encryption.
I have 2 of these APs deployed in different environments and they behave the same way. Light traffic - OK. Heavy or constant trafiic - drops. Pretty good for home use, but not that great for business. A step ahead, compared to other lower DLink products. Needs improvement.