My, I actually just saw this today, with pals - It was quite brilliant. In a mind-boggling way, really well crafted. Loved the whole ide about the dream worls collapsing, and the cinematography and effects, with the explosions were great. Loved the way some balance was brought near the end, as it was revealed Dom Cobb put the memory into his own wife's mind, and that caused her to be convinced in real life she had to kill herself to wake up. And also it being revealed that the scenes we saw near the beginning were Cobb in Limbo with an aged Saito. Cringed a bit when Michael Caine came on, though - not really a fan of his.
Also like how they left the mystery open as to whether he was dreaming or not with the totem still spinning.