In about 16 hours or so, which is shorter than the 22 hours I have so far in the first Prime game(and I haven't gone back to try and kill Metroid Prime yet). I finished with 81% scans, and 73% of the items(most of them missile expansions, because I found all the energy tanks, half the light/dark ammo things, and two of the three charge combos).
The first part of the Emperor Ing battle was almost as tough as either the Boost or Spider Ball Guardians, but after that it was really a piece of cake. And I wouldn't have run out of time in the Dark Samus battle if I had known I was SUPPOSED to let those little phazon things hit me, but overall it seems that DS battle is the easiest out of the other two.
I think I might be able to see why people think MP2 is harder than the first one, but MP2 seems easier to me; it's just more full of things to do. I went through MP1 tumbling over energy tanks and missile expansions, while I actually had to think about how to get them in MP2. It's like MM or TWW is to OoT. While OoT has an almost decent main quest, MM and TWW offer a much more complete experience all around.
Besides that, there is no way the majority of the bosses in MP2 are easier than those in MP1. It is simply impossible. I might agree about Flaahgra or whatever it's name is, but that thing would keep flipping those sun-reflector-things back down if you didn't pay attention.
And no matter what anybody says, it would make no sense to say that MP2 had any more backtracking than MP1 did. The only backtracking I remember was having to go get the Missile upgrade in the Temple Grounds, and then the Power bomb upgrade in Torvus Bog. And of course there are the Sky Temple keys, but they're only as bad as those Artifacts.
As for the game itself, it was fun, I guess, but after getting a stupid ending like that, I don't feel it was quite worth it, and I definetly won't be trying hard mode out unless I'm bored.
