I've managed about 35 hours of play on the PS3 and the game is so riddled with crippling bugs and console freezing crashes that it is completely unplayable.
I really enjoyed Fallout 3 despite the occasional crash and bought this despite the rumours that had surfaced. The differences in game-play are minuscule to the point that this is effectively a very poor and unstable expansion pack. The engine is the obviously the same, as are most of the items, textures, interfaces etc and the developers have been so lazy that they have even copied and pasted entire buildings from Fallout 3 into this game. (I found the Republic of Dave main building, renamed, after a few hours play. Hardly any of the original's gameplay has been improved. Additions are so poorly explained in-game that they smack of last minute, poorly thought out additions
In the time I have been playing I have had about one console freezing crash for every hour's play. I have had to put up with glitches that randomly lock me out of certain areas, lost or disappeared companions and the developers have been so bone-idle in their testing that entire quest sequences can be followed without becoming "official" i.e. courier style missions within camp McCarren, (no-spoiler there, you are "the Courier"). These are chock full of glitches and a plethora of other issues. Worse than any beta I have seen.
I have watched NPCs sat in thin air typing imaginary keyboards, floating or clipped AI enemies, been stuck in an eternal "fall" with no recourse other than to reload and to top it all have had an autosave file corrupt following one of many game-induced system crashes. For the sake of my Console, to reduce the chance of it failing due to continual hard rebooting, I cannot afford the risk of using this ridiculous excuse for a complete game any longer.
Fallout: New Vegas should never have been released in the condition it is in. Personally, I think everyone who has purchased it should return it to the retailer. I certainly will even if it costs me some of the original money. Unless this is done, shoddy muck like this will continue to be thrust at us with the promise of "jam tomorrow". Game players, regardless of platform should not be subjected to this tripe.
Do not buy this game. If you own it, I seriously recommend returning it immediately in protest at this pitiful excuse for a game.