I have had the 733 four two years now, love it, have had no problem at all, in fact still on the same batteries I started out with...couldn't live without it. A little confusing at first to program, but almost second nature now, don't even think about, can set in a few seconds. Just remember to turn on the rec on first, then the transmitter syncs up in a few seconds. I have gone out to my garage with the rec and it still works...garage is some 200 ft away on the far side of the house/patio area, works every where in the house, best thing I have ever got for smoker.