The MP3 400 wasn't a terrible vehicle. My wife had one for a bit but in the end found it both a bit heavy and top heavy.
I did get to ride it a tetch and found that on a sandy turn it held very well, & that in all turns it was fun to take down the the locks in a lean.
Fugly? eh, ya get used to it.
What I didn't like was the feel of the small front wheels on broken surfaces. Don't get me wrong, it was stable, but a bit rattly on that kind of surface.
Of note. No mechanical issues at all and the parts I did replace (due to breakage and wear) were not insanely expensive or hard to get.
The newer ones increased front wheel size, I ponder one now and again, but the old one left me a bit cramped so I'd be more likely to check out the Yamaha first if we had 'em all. Who knows. In the coming recession maybe economics will bring more bikes back to the U.S.?