i have been Airtronics and jr since i have started this hobby, i have a Air 358 gong on 2 years, well actually two of them. i recently tried the Ace 1313 and the 1015 and i have been very pleased with the both of them..staying centered and with minimum slack. As a matter of fact i just got another 1015..(as it is a little more powerful and faster then they have listed). just putting that out there..it is pretty good