I wouldn't bother planning on using it (or others) to view lengthy videos.
Although the screen is good, videos are blocky when played back, and the screen wouldn't do anyones eyes any good if viewed for a long time.
The phone's features are brilliant. As with all Sony Ericssons, the menu is operated primarily by the joystick, which is good once you've got used to it. Be warned though, that SE's joysticks have a tendancy of becoming quite tempremental after a few months of heavy-ish use. Do your best to keep it clean and it'll last a while longer. If, just before the 12 (or 18) months is up, you find it is becoming troublesome, have it repaired by your network.
The camera is brilliant, with auto-focus, flash and "Best Pic". I've taken some good pictures in various settings, from sunny outdoor shots to dark concerts and all have come out well.
It all depends what else you're looking for in a phone really.