It's very good. I got it on a new Nokia 700 phone.
It basically does what it says on the tin, and the 700 is a much smaller package than an Iphone or similar.
The only irritations I have found so far are
- no way to set a default BCC on outgoing emails (daft, on a mobile device)
- no way to delete incoming POP emails from the server also
- most "old" Symbian apps will run but often not in a usable way because using the touch screen activates their menu items as you touch the screen
Very few bugs. I have had to reset the phone only once, to clear up an old file browser app.
It's a pity Nokia have abandoned Symbian, but app developers have voted with their feet around 2009 anyway, with all new efforts going into Apple IOS... so there are not many properly working apps for the latest Symbian OS.