MM I've just used one for a first ever hatch. It was fiddly to get the correct temperature. We bought a reptile meter with accurate temp and humidity. It took a few hours for the temperature to settle each time we altered it so took a few days to perfect it then it needed lowered at stages through the hatch as temperatures Rose.
The biggest problem I found was humidity. Dry was only 25% we struggled to keep it above 50 for the hatch which I'm blaming for a few deaths in shell

We ended up putting a cloth in the bottom and dribbling water on twice daily to try to keep the humidity up once one was stuck in the membrane, confirming the need to drastically try raising the humidity.
My advice is prepare it well ahead. We were panicking as the eggs were on the way and we were still fiddling
Good luck with the hatch
