Definately use the speed brake.
The Roo will slow way down without stalling, and like everyone has said it avoids the hop.
I have a JR 7803 transmitter and have mixed the brakes to elev and also a knob so I can turn on a little brake drag before I land.
Also use the travel adjust and set it to zero for the brakes with up elev.
You'll have fun with the Roo.