Personally, I found glass to be far too quirky and it was far harder to maintain temps and humidity at an appropriate level so I made the switch to tubs. I have no issues with temps at all now.

If you're as stressed as I was in the beginning, I'd suggest going to Walmart tomorrow and buying a size appropriate, lockable tub that you can make into your snakes new home. Use 1 layer of paper towel as substrate, mist the lid once a day and you'll be fine.

I use lamp dimmers on my heat mats and it works perfectly.