Herpstat and VE are solid piece of equipment.

It's a matter of preference, Herpstat has been around much longer.

I prefer herpstat that is all you will see in my snake room and I still have some 9 years old herpstats running also I am upgrading them one by one (I like uniformity and see blue light everywhere )

In the office I have a VE and I never had any issue with it, bought it when they first came out.