I feel it provides more even temperatures once up to stable temp calibrated. . . . But, I give new racks, incubators, and enclosures anywhere from two days to a week before I stick snakes in.
That said, my experience with on/off type thermostats is limited to either aquarium use, or one really awful experience trying to use a cheap (ZooMed? Hydrofarm? I honestly can't remember) thermostat about ten years ago -- prior to getting a Herpstat.
Since my local supplier has Herpstats, I never had the chance to try Helix. I'd have to look, but I think the oldest I have running are around 8-9 years old and have been run more or less constantly, only turned off during power outages and when I've had to move stuff around. Since I've been super happy with them, I've never felt the need to try a different brand. And, as I've had such a good experience, I feel very comfortable recommending them.