it really depends on what you want, if you wan't loads of apps/games you'll be dissapointed, it does have a lot of apps but not as many as most other phone os's
however it is a fantastic device.
in my experience having one since march, its only ever crashed once so its very stable, it has flash 9 support so you get the full web experience (ish) it needs an upgrade to flash 10.1 but we don't know if its coming.
although it has almost no games, you can download emulators and play all the classic N64, PS1, MegaDrive and GameBoy games.

it has support for live wallpapers like you see on android phones

the cpu can be over clocked

there's too much to list really but coming from an N95 8GB and an N97, its so much better