I replaced a Motorola v220 with this RAZR V3i, and have not been happier. This is a great phone - it has a stylishm thin design, but is not so small that you feel it is hard to use. The keys are large and are "outlined" with a material that feels like a gel that keeps your fingers from slipping off the keys. The display is large and bright, very easy to look at.
The menu system is also easy to navigate - it is very intuitive, and can be easily figured out by anyone, even if they ahve not used a cell phone before.
Reception is fantastic - the calls come through loud and clear. Volume was my main complaint with my old phone, I did not always feel I could hear the other person. The RAZR is crisp sounding, and the volume of your calls is great. Even when walking a downtown street with plenty of traffic, there have been very few times where I could not hear the person on the other end of the phone.
It is a slightly less durable phone than my previous however - if dropped onto a hard surface, the battery tends to pop off, but the phone still works without a problem. You just have to hope the battery does not skitter off somewhere you cannot retreive it!
It is a very slim phone so it is easily carried in a pocket without being too bulky, and is large enough that it will not get lost in a purse of bag.
It has a camera with zoom, and the picture quality is great for a camera phone.
All in all, this has been the best phone I have ever used.