Yes, I did the whole MB --> MBP --> MB transition. I really prefer the MacBook Pro, but I just got really tired of dealing with all the quality control issues I was encountering. Out of the 6 MacBook Pros I had (so many because of exchanges due to issues), 5 of these had significant problems, ranging from warped cases and exploding batteries to bad screens and logic board defects.
By contrast, I've had two MacBooks with absolutely no issues, and various family members and friends have had a combined total of 8 MacBooks with absolutely no issues. None of my other Apple products (a couple of iMacs, numerous iPods, and an AppleTV) have ever had any problems either.
While I would love another MBP right now, I'm no longer willing to gamble with my money, at least not until another revision or two restores my confidence in the product's quality. And of course, my luck with the MBP line was unusually bad---but it's still MY luck, and it didn't seem to be getting any better.
So I exchanged my most recent MBP---a 17" Santa Rosa hi-res model with upgraded hard drive and RAM---for a new 24" iMac and a 13" BlackBook, for nearly even money.
I miss the larger laptop screen and higher resolution A LOT---but my stress level has been noticeably lower since the exchange.