I have had one. It was fun to drive and I used it as every day transport for a while, mine developed an overheating problem on long steep hills but apart from that it went well.
I also owned it before I was aware of the internet shops in Europe so parts were not always easy to get.
Now days you can just click a few links and await delivery
Most annoying thing was people in the street calling it a Bambino. After a while you get used to it and stop trying to explain the difference.
So what did I do to solve that problem. I sold the 600 and bought a 500!