I've got a c902 and it's fine - used all day every day, not been switched off in 4 months... Granted some of them have been poor but a lot of it is scaremongering N-series 'fanboyz'. Had a K750i which was ace, swapped for a W880i, then a W910i, then a W890i, then a c902. The W880i got run over, the W910i is now the other half's phone and the W890i is now my sisters - the W910i very occasionally locks up with a red light on the back, but then she had 3000+ messages in her inbox. Deleted them and it's been good as gold since. Sister is first to whinge about phones but she still loves her W890i.
As I said though, my c902 is ace. Especially as T-Mobile 'gave' it to me for free - not even so much as a contract extension required.