Honestly I just got my first BP and I didn't go with a very expensive morph because I quickly realized how valuable a t-stat was going to be. I ordered one from a local shop just opening here, and waited for it to arrive.
In the meantime got my female pastel earlier than expected. I was adjusting my dimmer several times a day to keep things consistent until my Herpstat 1 Basic arrived. I couldn't be happier now that has! The last 5 days have been amazing. I got it setup in no time and set my alarms for hi and low and everything is so stable now it isn't funny. I can start enjoying having her as a pet now and stop agonizing about temps all day. (I still check once a day with a temp gun to be safe though).
Spend the money on a good t-stat so you can enjoy your pet. My setup is a little different than most on here because I am using a CHE as a heat source and even if it runs at max my temps aren't far off just in case of a failure. If you are using belly heat then get a Herpstat 1 not the 1 Basic.
Temps are always the first most important thing so why gamble when you don't have to.
2cents from a Newb.