Macbook Pro. Parallels and Boot Camp to run windows. Never going back.
My experiences with all PCs, not just laptops, is given that models are obsolete in 18 months, they throw these things together out of parts from manufacturers from X, Y and Z and sometimes those parts are happy together and sometime they're not.
Either they work together perfectly for years, or they give trouble from day one. It's luck of the draw (about 1 in 10), I've never found a manufacturer this wasn't true of. It's usually particular models.
This is speaking of instability and performance problems (which usually seem to be the main issue and are sometimes fixable by driver updates), not outright harware failures which can happen to any brand.
Once my friends have taken their PC back to be reinstalled a three times, I just tell them, forget about it, just write it off and get a new one. The shop/dealer will never give warranty replacement. They'll just keep 'fixing' it every three months until the warranty runs out.
It's just part of buying a PC, the hidden 'price' for cheap builds (and not-so-cheap builds).
Particularly for business office computers, the price of downtime can quickly exceed the price of a new PC.