I've always used the Helix DBS1000, but I've had a Herpstat for a while and I like it just as much... I do prefer the orange LED readout of the Herpstat over the Helix's green LED readout...
I have an original style herpstat like others have shown pics of for my rack and love it. My new herpstat 2 that I use for my incubators is amazing! I love both and have had no issues or complaints about either one.