I have two Mayhems..Love them..fly better then UCD Sold both my ukies...I tried the Saito 100 not enough pwoer for me...I love full all out 3d and am using a YS 110 on one and 140 YS sport on another...hovers at half or less throttle and can pull out with authority...the Saito 100 took 7/8 throttle to hover with no pull out....the plane knife edges with little to no coupling..Could not say that for the UCD...Will fly Slow and fast...tracks like a pattern plane yet performs most all manuvers...the only one I cannot get it to perform is a inverted Flat spin...does a spiral...Will have to try different CG setting...All and All is a great flyer and moved up to my 2nd favorite plane...