Mike, the setup is a basic tank setup with a screen top.
OP, DEFINITELY spend the $100 on a herpstat. A thermostat is the best investment you can make for your snake! Once you plug the UTH into the thermostat and secure the probe between the heat mat and the glass bottom (on the outside of the tank), you will set the thermostat to a certain temp (say 90*). What that thermostat will do is keep the UTH set at 90* to keep a constant hot spot.