Guess I'll chime in and follow the pack. I love my Helix controllers. I have two for racks and one for the incubator.
After purchasing my first Helix DBS1000, I thought about getting the Herpstat. The one feature I liked about it were the + and - buttons that allow you to make adjustments quickly.
It's not quite as easy with the Helix. If I want to adjust the Helix set temperature from 83 to 82, I have to hold the button down until it counts up through 100 then it starts back at 40 and reaches the desired 82 set point. It's really not too bad, but I think the +/- buttons would be an added plus to the Helix product. In the end, I decided to stick with Helix. I was very happy with the performance and figured "if it ain't broke, don't fix it."
When I first started looking at Helix controllers, I didn't realize that there were two DBS1000 models. I think most places carry the "high temp" model which allows a temperature set point from 60 to 120 F. When I called Helix, they told me about the "low temp" model. It allows a temperature set point from 40 to 100F. I was told to request the "low temp" model when ordering directly from Helix, otherwise the DBS1000 "high temp" was sold as the standard.
I bought the "low temp" models for the racks, because as an added bonus I can use them to control my desired brumation temps too. My incubator came with the "high temp" model.
Bottom line, I'm very happy with Helix.