I used to have it for aircraft, and my main reason for getting it was the ability for telemetry. Unfortunately this feature never really materialized, so I switched to Spektrum (aircraft) as more BNF kits started coming out. I still believe that XPS has one of the better products out there (most of the recent offerings are user programmable/upgradable), but the lack of telemetry and tiny receivers was the reason for me not sticking with it.

http://www.rcgroups.com/xtreme-power-systems-483/

Vas