Coupling: Easy
Reception: very good
Voice quality: Very good
Features: Most of the features of the Gigaset not going is simply calling. But I did not expect. The M2's tuned to the AVM router and not to other manufacturers. Even the phone book requires the AVM routers.
Otherwise, ringtones and display settings can be completed quickly. MP3 as a ringtone can not.
Battery life very good, have no problems with 6 hours calls a day
More if the AVM router is there.