I use flaperons on my Rascal Forty and there are no bad habits to worry about on this particular airplane. I cannot vouch for any other though. If you want to see them in action, I am landing in this video every time with flaperons deployed:

http://media.putfile.com/Sig-Rascal-Forty

Edit: Alright, it's been awhile since I watched this video and I cannot be certain the two first touch and goes had the flaperons deployed. But for sure the final landing does, and you can hear the 'click' of the Tx when I retract them after landing and you can also see them in the deployed position before I swtich the Tx.