they're very nice for the money. they're well built, sound pretty good and look great. it doesn't really sound like a Gibson but then again, it has different pickups and active electronics. it's got it's own voice and I get compliments on it from the guys I play with. you can get an old school thump or a more modern slap sound and everything in between. a lot of bass for the $$.
common tbird myths:
one of the first things folks say about tbirds is THE NECK DIVE, but it's no worse than any other bass I've played. I think it's more of a TB myth than anything else. you do have to reach a bit to play a low F but even that isn't as bad as you might be led to believe and it doesn't equate to neck dive.
if anybody says 'they sound muddy', they've probably not heard one. some of Gibson's EB series sounded muddy but tbirds don't. they may not be as bright as a bass with single coil pickups, but that doesn't make them muddy sounding.
the other myth you'll hear is how heavy they are. they weigh less than 10 lbs. the Epi birds are a bit heavier than a Gibson bird (very light) but that's it.
you should search for topics about it, there's plenty of them.
some pics of mine
one of my friends also bought one, so we got them together