Pretty enjoyable game the best part is the story. Unfortunately the frame rate sucks and the game is not as polished as ME2 the docking and leaving CG isn't there for major outposts. I didn't like the new look for the inside of the Normandy ship too.
Biggest problem is I was halfway through, and my Save got Corrupted FAIL! They should have ironed out the bugs.
I was expecting a lot from this game because of all the hype...and I think it delivered. There were a few things I missed from ME2, including the ability to mine minerals, but over all I think it was an great 3rd edition to the installment. I agree with some of the other reviews in that the ending left me feeling unsatisfied. I accidentally went ahead and began the final mission (assault) too soon before I had a chance to build up my forces and characters enough. It was still possible to beat it but probably would have been easier had I not goofed that up. I may go back to a previous save and try again. The gameplay and mechanics are still smooth and the mixture of weapons is satisfying as well.
Overall I would say buying this game would not be a waste of $60. If you've never played any of the previous games and are just curious, then you can always rent and if you decide to buy you have that option.
I actually played ME2 on the PC and ME3 on the PS#3 and liked the PS3 version better. But recently I've been moving towards PS3 versions of games just because of difficulties with my laptop.