I have flaperons on My Stik 30 set up working only as spoilers because the plane tends to float on landings. They go up less than 10 degrees but they really make the plane come down in a solid, controllable fashion. I just put them on a switch and up they go.

I was shooting a video of the difference between a spoiler and non-spoiler approach last year but my video camera died in the process and I haven't replaced it. There's a noticeable difference though.