I have the Sony Ericsson K810i
I use the camera a lot with the flash, it's awesome.
I use the 3G Data speeds with my laptop when in hotels etc.
I use the Video calling function with family and friends.
It's stable, reliable, well built, pretty good battery life. It plays MP3 & M4A files absolutely fine.
A lot of problems with these phones tends to come with the buggy software the networks put on the phones, they ship them out with no real-world testing.
Yeah, I have the W810 and it is very good. Good reception, great battery life, plays MP3s, or AACs, video, camera, etc.
I have used Nokia, Motorola, and some of the really crap LG or self branded Sprint phones, this SE is by far the best phone I have used in a long time.