I have 5 of these. They work well. You set the temperature to your desired maximum (I put mine at 90-91 for Ball Python's) and it will shut itself off once it reaches 91 degrees, then vary between 88-91, turning itself on again and off again to keep appropriate temps. Herpstat works differently because it is able to keep the constant temperature. Eventually I will upgrade to herpstat, but for temporary use Jumpstart is great. All of my animals are happy and healthy. Also, I was having issues with my house being cold as well. I have all my reptiles in one room so I opted for a space heater, maybe that would help to up your ambient temps. Or you can always sell your 80w RHP and buy a smaller one.
Edit: I agree with treaux, if you have your set up all decked out you may as well go for the Herpstat. I really wish I had got one to begin with, just because they are more accurate and known to last waaaayyy longer.