I'll never buy a non sustainer glider again. Show it a little maintenance love (change the plugs periodically) and be sure to run it for 30-60 seconds every flight. You'll want some earplugs but you'll probably only use them if you're tunning it for longer than the 30 second "daily check"

The SH sustem with the multi blade folding prop is a tad nicer since you never have to worry about prop position.