I think the main thing is that laptops in general, whether it be a PC laptop or Macbook just aren't ever as powerful as a desktop. If you really want a powerful, reliable machine then you aren't going to find one in a laptop.
I personally own a desktop PC and a Macbook Pro. After two years of owning and using the Macbook I am still a PC person 100%. I only use the Macbook when I can't use my PC for some reason, it's just not as good. My macbook overheats and easily crashes if it has to run anything too heavy.
It's fine for browsing the internet, checking emails, using a word processor etc, but I wouldn't recommend a macbook for anything heavier than that. Mine sometimes crashes even just using photoshop.
EDIT: I just noticed that you've already ordered it. In that case good luck.