There are some nice design elements here. IE it looks to be strong, has no struts on the tail, willl take 6s. Reminds me of a scaled down Minip frame - sort of. The drive train? well it appears that you would loose teeth on the main cog on the event of a smallish type crash. Crashability might be an important factor with this heli. If it can survive a moderate crash most of the time that would poll in its favor..