i have owned three herp powers,they will work ok but even at $75 each are they a good deal? keep in mind they have only 300 watts per unit and adding a night drop is a hassle.for your rack and incubator you would need two for $150.

i now own two herpstat's ll's and wouldn't own anything else.for your rack and incubator you could get one and have two probes with 700 watts on each with built in night drop and a ton of other features for a little over $200 plus it's new and has a warranty.no brainer IMO.