I tried sandwich with weed, and a unit like that except with removable bowl. I could not get it right with a torch.
So I got this kit and I've have had nothing but success since. It was easily worth the $$.
The temperature setting on fahrenheit is very accurate - I checked with a heat gun.
I tested ~5mg hits at different temps and it worked well over 380-400 degrees. But reading a thread on r/DMT where a number of people said they liked to "get it as hot as possible" because it all vaporizes at once and you get a more concentrated hit, I tried stepping up the temperature.
Now I use 650-700 degrees and that really does seem to give me the best hit and trips.