My problem with these adapters was frequent and persistent burglaries of the entire network. Sometimes there were frequent short dips and all couples days full terminations, which only thus could be solved by ALL adapters throughout the house, gathered up, put into a power strip and then reset all tete. This is to make every few days just a no go. Together with the extremely annoying short interruptions of about 2 minutes, I decided for an older adapter. Old models like the 650+ and the very old 6000kbit / s adapters do not have this problem with me. The customer service was also me, after four phone calls do not help. I also find the individual purchase price as overpriced.
About the data rate the previous speakers have already dargelassen enough konstuktive criticism, therefore only briefly my personal experience. Displayed 1200 Mbit / s can not be rudimentary in my household (an average of only 200 Mbit / s), but also is not really tragic, because I no longer need, but let me say that the 650+ Adapter with me better Ergebisse achieve (~ 250 Mbit / s), which is not MUST.
All in all, I regret to say that the 1200+ Adapter unfortunately are completely immature, in my view, therefore, only one star.