Sain't Row is the first GTA clone to hit the Xbox 360, but at the same time, it's also the first GTA clone that's not only good, but better than most GTA games I've played.
Gameplay:
Take GTA, add some thug to it, and you get Sain't Row. Saint's Row takes pretty much every aspect of GTA and makes it that much better. Shooting in SR is dual analog control, so now more annoying lock-on and strafe crap. Driving is much easier and cars take more damage. The city also has many districts to explore and 3 rival gangs to topple. Mission variety is kind of lacking, but the game is still fun. It has a great story, great gameplay, and hours of fun. Holding up stores, doing side missions, etc. is much more enjoyable since SR does it all with ease.
Graphics:
Really great looking. The detail in the game is shocking. Character models, car models, building exterior and interiors...all look great.
Sound:
Tons of great music from people you've probably never heard. But with that ton of good music, there is a ton of annoying music. The game has a humongous sountrack. City life noises (cars, people, trains, etc) all sound really good too. You get a good feel of city sounds.
Replay:
With tons of story missions, side missions to build respect, tagging, CD finding, and even online multiplayer, you'll find yourself emersed in Saints Row for hours upon hours.
Overall:
Easily the best GTA clone thus far. It even exceeds most GTAs to be honest. It is also a must own for 360 owners. Get this game.