I did, but only because it was a nominal cost once I factored in the price I got for my MacBook, student discount, free ipod and printer. Got the 2.53GHz originally but it's got a faulty HDD, so I'm returning it and have decided to downgrade to the 2.26GHz as I have bought a WD SB 500GB HDD anyway, and a RAM upgrade is only £50, meaning I save £170ish by taking the slower processor (and I'm pretty sure I'm not going to notice the difference). Worth it? Yeah, I think so. This one feels much more solid than the Unibody MacBook did; also, I had a problem with the MacBook that the battery cover would move slightly when typing, and would make a noise, and this isn't a problem with the new shell. I, personally, do not find that the battery life is improved significantly, if at all, but maybe I just had a great battery with my old one. So, anyone else sell their 8 month old unibody for a new 13" MBP?