I had one a while ago, BEST DAMN BIKE EVER! Was my first "thing" with a motor on it.
Abused the crap out of it and it was my daily to school and back and everything imaginable for 3 years before i got a drivers license.
Only maintance i did to it was add fuel and tighten bolts, never left me stranded, always started, probably had 15k miles on it before i sold it to a good friend of mine (who still hoons around with it to this day)
If your gonna get one, get it with the 1 piece head/cylinder (66cc version, or the 100cc/79cc one, whatever your flavor is) there a better option than the 2 piece design (built wayy better also, doesn't feel like its gonna snap the frame in half)