I've been using my TP-20 since January, I've probably done about 15ish smokes with it. First thing impressions on the unit, toss out the super cheap crap batteries that come with it. I wish manufactures wouldn't ship items with those crazy super cheap Chinese knock off batteries. I'd rather get a unit that came with no batteries, I've had really bad experiences in the past with those cheap knock off batteries. Other than that The unit was very nicely packaged, and super easy to set up. I had no issues pairing the units, overall fit and finish of the unit is very nice. As far as range goes, I've gone up to about 60 feet with zero issues. My neighbor is A master Ford mechanic, he has a fancy thousand dollar digital heat probe, so we did extensive testing on temperature accuracy. Overall between the temperature ranges of 175 to 250 it was very accurate. The biggest discrepancy we got was at 175 and it was off by 2°, other than that it was exactly right or off by 1°. Down between 75 and 100° the unit was off by as much as 10°, we repeated the testing five times and came up with the same results. When we tried testing 350 we started getting a little more variation then the 0 to 1°. Once we hit 400° it started being off by as much as 5 to 10° again. Which really doesn't bother me because all the smoking I do is usually between 175 and 250 , overall this is what I believe it to be a very nice unit, we also use the voltmeter to check the batteries on it the other day and the batteries have barely lost any power after approximately 15 uses and two months time.