had good luck with mine, haven't put a lot of miles on it. I'm running it with a Jog CDI box and it has a nice curvey curve.
i also followed the 'cheetahchrome' tutorial on how to ground everything... scraped paint off all the mounting faces and use SHCS m4 screws to bolt the coils down with lock washers.
its probably the nicest of the cheap moped ignitions, i've even used the pickup from it on puchs. tapers fit up pretty nice and true.
i did counterbore mine and make a special custom nut to mount it but you can just grind the end of the nut so it fits down in the hole.