Flexwatt is a UTH that doesnt have sticky stuff on it. You attach it with aluminum foil tape on the corners. Much easier to work with as you can peel the tape off, throw it away and reattach the UTH to anything else.

As for which Herpstat, my vote goes to at minimum a Herpstat 1 . Not the Herpstat 1 basic. If you plan on maybe getting more snakes later, i would say pay the extra and get a Herpstat 2. Gives you more flexibility later on if you decide on another snake or need to add a RHP for winter time.