Vegas is a good game with great gameplay but it's obviously a really bad 360 port with very bad optimization...
Your hit by a ton of splash screens as soon as you load up which can be quite annoying and that i've noticed is the menus can take a long time to load. I even timed it from getting through the menus and to the multiplayer server browser and then into a game took about 2 mins 30.... I have a x1950xtx 2 gb ram and core 2 duo 6700 aswel....
Also in the options it really has no customization like other original PC games like basically nothing for graphics apart from HDR and the res. Also if you turn HDR off the game gets some weird little graphical effects on darker colours. Theres a fix for this on the forums but it doesn't really help because then the graphics just look cheap, so really you have no option but to have HDR on. Also theres no AA options in the menu and you'll have to force that on but with HDR having to be on you'll need a beefy PC. The Multiplayer menus aswel are quite poor with the server browser not really giving you any information that you want. It's obviously a 360 port here too because it has quick find and game which doesn't work well for PC users and they should have put their efforts into making the browser better. You can't change the size of the browser too which is annoying because it is quite small and you can put servers in order of like say most players. Another thing is servers often say 15/16 players but if you try to join them then they're probably full and you've wasted 10 seconds lol.
Onto optimization and it is **** poor and again this shows you that all efforts have been made for the 360 version but nothing on the PC side of things. The game doesn't even look good compared to other Unreal 3 engine games and it doesn't perform well at all with me only having 40FPS which is dumb considering i'll be able to run Crysis on DX9 with High settings very well or UT3 on max well. Again because you can't change much in the way of graphical settings unless your a computer geek and can edit the config files then it doesn't scale down well at all. This obviously really impacts the population of the multiplayer which is very low and you'll struggle to find a game.
The Gameplay is great though and has a average length single player with a poor storyline, tbh though you'll only play it because the gameplay is sooo fun. You wotn be able to run a gun and you'll need to take cover alot which is made fun by the cover system. If you've played Gears of War then you'll know that thats like and it really adds ALOT to the gameplay. Also theres no 100HP health bar crap so it'll be like COD or GEOW where the more damage you take the more blurry or red your screen with get until you die, this indicates that you need to take cover. The game is split up into a series of levels with options to customize your character between each one which is nice. You'll obviously be fighting in Las Vegas and it's really nice to be fighting in casinos. The ending is really poor but considering the storyline isn't all that great you wont really care and then you'll move onto the multiplayer to have fun with the gameplay further. The Multiplayer past the menus is great however the graphics arn't as good as the multiplayer and it is a shame because theres no options at all to change this which again says bad port. good luck trying to get into a game though as most of the fans of the series are still paying RVS (the 3rd game) lol. With lots of customizable stuff on your character which is a refreshing change from everyother multiplayer FPS it is fun to make yours look different from everyone elses. The Guns in the game are all fantastic although theres not as many as RVS but still ALOT! So all that with the cover system makes for a great multiplayer game but i was personally put off it because it's a very bad port that i couldn't stand it anymore.
The graphics are all good but not great and no real options really puts them down for me. The sound on the weapons are good and all the radio voice overs are very well done, the music is so so... what do you expect though? All you'll wanna do is hear your weapons fire lol.
All in all Vegas has great gameplay ruined by being a bad 360 port, which is a shame as it's a good game. IF you can overlook these issues then you'll love it but as i can't it's only "GOOD" and not "AMAZING".....