I actualy got to ride one last week and it was a blast. It's very strong! It was brand new and was so tight that as soon as you let off the gas it would immediately drop the rpm's down to idle, of coarse I had just got off my 2-stroke. It seemed to handle well from what little time I got to take it on the track but not being set up for me it had a tendancy to want to kick the rear up on every jump, again I just came off a 2-stroke so that may have been my fault.
Reliability is something yet to be proven since they haven't been out long enough to tell but if it's like the rest of the KTM's, I'd say it's a good choice to go with.