Yes I have a few of the flukers ones. I have found them to be fairly good surprisingly. The battery is a bit of a pain but they only need a new one every couple of years so i guess that is ok. The accuracy of the 6 I have is ok there is one that has become way off (too much dust in it) but the others are in a degree or so and 7%rh not bad by cheap digitals standards.

They only are able to measure the ambient temp and RH you really should also have a probed thermometer in each hide hot and cool. I would suggest this type cheap and disposable when hey go off (and all cheap digitals will)

http://www.ebay.ca/itm/Digital-LCD-T...ht_3685wt_1398

I would suggest buying 3-5 of them and checking them together and not using any that seem different. (against the flukers will work) unless you know the accuracy of a unit or have a known accurate one (traceable in both cases) this is the only easy way to check them.

I have never found accurites to be accurate. I have owned 3 two returned as they were outside the allowable specs (+/-2ºF and +/-15% RH) and the other sat at 2ºF high and 15% low so I ended up having to keep it. (and give it to my dada to use) The only good experience with them was they did return them with out question.