MGSIV is a remarkable and impressive entry in to the MGS world, and the PS3 library.
Although the controls and interface have improved to the point where you almost forget you're even using it, there is still a learning curve to pickup everything Snake and his item technology is capable of. Luckily, there is an extra Virtual Range added to assist you if you want to improve, but realistically Snake is well and fine with what it teaches you how to do within the first Act. In order to master all his CQC and tech abilities though, you'll definitely want to spend some time outside of the main story to practice in the VR.
I rated this only a 9 because I see how some people can get a little exhausted by the long-winded story and frequent cut-scenes - however true to the MGS series it may be. Personally, I feel the story adds a depth and background to each mission and level purpose that the game wouldn't be the same without. However, if you're looking for a straight-action game and less dialogue, the frequency of the interruptions might get a little distracting. If you're a veteran to the Metal Gear series, you'll know exactly what to expect from these scenes and you won't be disappointed. This is by far, in my opinion, the best of series and the best display of PS3 capability to date.