The sound quality during calls can to be desired - there I am, by Grandstream, much better used.
Battery performance is suboptimal; Sure, I can (thankfully) just load new AA batteries, but I would have expected more here. This could the Gigaset better 10 years ago.
Only incoming, missed calls are stored - outgoing include in the list is not available. Why? And why can not I take example from an XML file contacts?
Configuration is done via web interface, yes. However, this is fairly dowdy and absolutely not be done by a layman VoIP.
All in all, a handset-90s (of quality and usefulness), probably bought cheaply in China, coupled with a base station that already has dust in the source code.
The device I can not recommend absolutely!