I used that exact phone (well, it had a different plastic shell was called "cardphone" - no bluetooth) for a year as my main cell phone.

It worked very well, had about 3 days of battery time (given my uses). The best part is that I never forgot it, given how small it was - always there with my credit cards

Unfortunately, the headphone died after a bad fall (I could still use on speakermode).

I'll be very happy to buy a new one, especially it has bluetooth now. (if there's someone from China I would be interested, it usually sells for 3 times as much on ebay :-)