The best feature about this phone is boring but great: the battery lasts for absolutely ages!
I bought it as an Xmas present for a relative who wanted something as easy to use and reliable as possible. I gave it a bit of a test run beforehand and the battery only needed recharging after seven or eight days, and that included calls and texts every day.
The menus are simplified versions of the normal Nokia menu, functions that most people never use have been stripped away and the icons scroll across the screen in a way that lets you see the upcoming icons in the corner.
Interestingly, there's also a series of demo animations which show how to use the main functions of the phone like calls, texts etc. If you ever forget how to do something, you can just pick a demo mode and watch the animation to remind yourself.
I wouldn't recommend this as a phone for more advanced users, it doesn't support Java and it doesn't have any kind of internet connection.
The ringtones are surprisingly good though, about five of them are MP3 files with wonderful sound and even vocals (sample lyric from an M people type singer: "can you hear me when I say... I'm waiting for you to answer my call"), but the catch is that they're built in and you can't add any ring tones of your own.
Oh yeah, and it's also a really good speakerphone. I tried using this with friends and they were unable to tell when I was on speaker and when I was talking normally. I was very surprised because my own smartphone's speakerphone makes me sound like I'm talking from inside a sardine tin.
Basically, this is GREAT for people new to phones or who have no desire to use any advanced features. It hardly ever needs recharging, the screen is bright and colourful and the ringtones sound wonderful. It's not so good for people who want to customise their phones with downloads.