We used a Cool Bot this year. When everything was working, it would keep the room at 55 degrees. Off and on, we had problems with the a/c unit icing up. I think it will work, but we need to fine tune it.
We ended up using two. The one with Cool Bot installed, is a new LG unit. We also installed an old but new unit to help when it got really hot. I tried all of their suggestions, moved the frost sending unit, adjusted the delay, raised the temp setting, etc., but couldn't get it to quit icing up.