I have them in my high dollar MBX5 prospec buggies and revos and a couple others.... They are Ok servos for what you pay for them. Im still a true Hitec HS5955tg guy and will allways keep those around.. But I have gotten a few of these servos for $20 shipped on ebay and gotten then and 1 of them not work or shutter like crazy when ya plug it in.. Good thing is the sellers have sent me replacements no questions asked... So with that said they must get alot of customers emailing about them being screwed up so their used to having to make it right somewhat by sending a replacement! Overall my 2cents they work for the money!!!