I haven't seen any of the issues people are talking about on the new MacBooks, though I have seen an issue where if I'm resting my thumb on the bottom of the pad like I used to when there was a discrete button I can't do two finger scrolling.

I had serious issues with the trackpad for the first 1.5 weeks. I realized I was resting the full left hand side of the first bone in my thumb on the trackpad and flipping back and forth between shell and selecting - it was getting confused. Since then my experienced has improved significantly, although I'm still looking forward to the fix they're talking about releasing soon though.