If your only looking for controling one rack or one enclosure the Helix is great. If you are looking for multiple control points the Herpstat Pro is hard to beat for the price. The Herpstat pro is 4 Thermostats in one package. If you were going to get 4 Helix units you would spend over $500 for all 4. With the Herpstat Pro you get 4 seperate temp probes and each one controls a different output for around $320. Hard to beat the savings!