Yes I have plenty of experience using that particular GPU. While it is true that mobile GPU's will never be as powerful as desktop GPU's. This thing effin ROCKS! I can play All the games I own on high without a problem. Borderlands 2, Crysis, Doom 3 BFG edition, GTA IV, GTA San Andreas, Portal 2, Dishonered, Call of Duty Black Ops 2, Fallout 3, Skyrim, Minecraft(on fancy/far)... Everything. This GPU rocks. I love it and if you are playing games that are out now then you shouldn't have any issue's. Plus they just updated the mobile drivers today. Nvidia Rocks.
Take those "benchmarks" with a grain of salt. I don't even run them. My laptop plays all of the newest games there is, and it plays them flawlessly. CoD BO2 I get ~100 FPS, Borderlands 2 ~ 57-90. I say get it, you wont regret it. Screw them benchmarks. They aren't real world testing. They are simulated averages for computers. Why spend $200 extra for a GPU that isn't going to improve a game that can only look so good in the first place?