I have an Xspec and a Sceadu, love them both, just plain awesome machines. The Xspec is the most unbelievable helicopter to fly especially with a 91 in it, absolultely dialed in and just locks into every position and maneuver. Hirobo seems to have slight better quality than the Ace stuff, (owned both), parts are just a coupla pennies more than ace but usually comparable on price. Best part is, Jeff Green is a really good guy and is the product dude/manager/the man in general and is usually accessable with a phone call or email. He is very responsive and takes care of his customers. You won't go wrong with them...