I finished playing this game the other day and I have to say it is truly a stunning game. I have had a checkered history with platformers in the past. but it seems like all I needed was the right one to come along.  The combat system is intuitive and awesome though I did have trouble ever getting past a 10x multiplier, but this isn't an issue with the game, just my ability to control it.  The stealth elements of the big rooms with lots of guns in them can frustrating for someone like me is a more run and gun kind of player, but once i got used to the absolute necessity of stealth I was able to make due.  The puzzle elements were interesting and I actually enjoyed them unlike most puzzles.  This is probably due to the fact that the puzzles aren't necessary to move forward and they're something you can just attack at your leisure.