I did around 200 miles on it in one day. It was on a pre-production to get miles built up. Yes its basically is a CRF but detuned for emissions. I didn't think it was heavy at all in the dirt. I thought it handled good. I did take it on the 15 Highway and with everyone doing 80 it was a little sketchy and I felt like I was ringing its neck at top speed. I thought overall it was a great bike. However I would definitely change the seat. It has the same seat as the CRF and my ass was hurting for awhile after the ride.