I bought a rebranded MSI Wind when they first came out (when I had my 15.2" MBP) as I have a motorbike and have a back problem, so can't lug heavy laptops on my back. The netbook was great and fit in my tank bag. The problem for me is two fold, performance and screen resolution (I'll ignore the crappy touch pad for now).
1024x600 may seem like a good resolution for browsing the web, yeah sure you don't have to do much horizontal scrolling, but you sure have to do a lot more vertical scrolling than I was expecting to have to do.
The performance was a bit naff, and yeah yeah, I know, its a 1.6GHz HT Atom, but it really wasn't what I was expecting. Slugish, choppy (playing back DivX and Xvid movies plus HD stuff on YouTube - which are only 480p)
I decided for a laugh to install OS X on it thinking it would be the ultimate Mac, small, light weight and supremely portable. OS X should NEVER be used with such a small resolution. 600 vertical pixels just sucks! I don't like the Dock to be hidden or on the side, but I just had to.
Personally, I'd keep the MPA.
pac