I was the only Airtronics user at my club until I started showing off the SD-10G, got several converts. It's very popular among sailplane pilots, but I like it as a GScale pilot because of the easy programming and things like throttle curves and stick switches. I hope they come out with some telemetry stuff in the future but I love the SD-10G as is and have a spare and an RDS8000 as my "carry in the car" radio in case a flying field runs out in front of me.
The customer support has always been outstanding and having Jack A as a tech support asset has been great, Craig K as Global Hobby contact has also been superb.
Whit