So the game wont crash when i get lvl 50? and the ine whole its like fallout 3 with a few crashes here and there?
Erm, wha?
No, the game won't crash specifically at level 50. Just like it won't crash specifically when you kill a powder ganger, enter a house, or do the hustle. What I'm saying is that crashes can happen. Just like they could happen in Fallout 3 for that matter. You might get lucky and never experience a single crash or you can crash once every hour. Bethesda's Gamebryo simply isn't the world's most stable engine.
As for New Vegas being like Fallout 3.
If you go in New Vegas expecting the exact same as Fallout 3, you can be disapointed. Between the two the gameplay is pretty much the same, but they are very different games when it comes to their respective settingdesigns, queststructures, and overall writing.