I bought one of these for my office at work and have been very pleased with it.
It has wonderful sound clarity and has excellent functions (including a calender function). All the functions are easy to understand and easy to set up. The screen provides icons with each function which makes it hard to confuse what you're fiddling with. The ringtones can be loud and sharp and there are several to choose from (you have the function to record your own ringtone), so even in noisey enviornments you can hear the phone ringing.
The phone battery seems to last well and I have not experienced it running out of power. I did leave the office one night and forget to cradle the phone. It still had power remaining two days later. The battery replenishes quickly but I have not had the phone long enough to know if it has a good service lifetime.
The phone looks nice and the colourful screen has a good layout offering you information about the time and date. It also has a few wallpapers to choose from, nothing exciting (clouds and the BT logo are two examples). It cannot receive new wallpapers so your choice is limited.
The phone is well constructed and the buttons are solid when you press them. The phone has the hard click type buttons which I prefer rather then the soft touch rubber buttons which some phones use. The handset sits in the cradle nicely and there is about 2 metres worth of cable as reach from the base to your wall sockets.
There is an option of sending SMS and inserting a SIM card.... as of yet I have not sucessfully managed to use these functions, but I am by no means a techno expert, have not spent much time fiddling around with it and have a very short attention span for reading user manuals.
The two functions that I find most useful are the excellent speakerphone and music whilst you put someone on hold. Excellent for my office but I'm not to sure how useful they would be when its being used as a home phone.
The answer phone is as normal and funtions no different to any other. You get a red flashing light on the handset, message counter and message on your screen as way of message alerts. There is no sound alert.
The only real critism is that, when the phone rings and it is on the base, after picking it up it takes a few seconds to connect. So when you pick it up it still rings when you put it to your ear. Also if you finish one call and immediately dial another number, the handset takes a second to move into action... leaving the first number off the number you're trying to dial.
I personally think it is a good phone and worth paying up to £60/70 for, especially if you are after a phone that has more of a mobile phone feel to it. It by no means has the most functions on it but it is a good easy to use, high clarity phone.