Well, there I am.
Almost 4 days after purchase I finally completed it (I thought it wouldn't end). If I look at my current saved game I got 41 hours in, that's of course a first playthrough without a single skipped dialog scene, thorough search for missions and resources (although not everything and each star systems were completed at 100%, but overall I'd say around 60% or so). I think I missed around 4 or 5 side missions I believe some of which had to be found, turned in or completed at the Citadel and somehow I just missed them, but no biggie.
Anyway, no spoiler at all here. I want to say this though. The game overall I believe is the best of the series, yes, better than the first in many aspects... but not all of them. I'd still rate ME3 the highest one of the series though, and it blows up ME2 out of the water like no body's business, it's not even funny. The start of the game does feel rushed a bit, nothing seriously bad though, it was still a great start, to-the-point (perhaps just too fast though, and not seeing enough where maybe you'd like to see things happen as you progress in a mission, but it's ok nothing major).
The real meat of the game though isn't the start, there's definitely a specific point from which things start to feel very fleshed out and you really feel and know that you're in for a long game, it really is the lengthiest of the series I'm sure of it, although still comparable to a first playthrough of the first, or perhaps a first playthrough of ME2 if you combine all major DLCs as well (all missions including the side quests). From "that point" (subjective I guess, but I won't mention anything to avoid any form of spoilers) I speak of when things kick in very nicely and well paced then I'd say that, overall (with some exceptions, as always, nothing is perfect and that's alright, happens to all games) it really is one of the very best games I've ever played (I remember saying the same thing about ME1 and I still believe it to this day), definitely on my top ten.
As for... well, "the rest", I guess. Well I won't spoil. But, let's just say that from a certain point things do start to feel rushed again. I'm not sure what happened exactly during the development, strange decisions (by the devs I mean) were made. But anyway, superb video gaming experience and I'll not forget about it for a very long time.
I'm not sure if I'm going to play again, because... well it's not like we'll have ME4 will we?
Maybe in the next cycle.