@ubbut they are indeed great. The ones I have are Zebra 110XiIIIPlus. As long as you use them as intended, namely sending them ZPL2 strings and don’t try to print using regular print drivers they are also fast. Thermal transfer allows for a very larger variety of materials. I wanted the serial stickers to be heat and chemical resistent. The printers are not cheap but materials are comparable price wise with direct thermal labels. And much cheaper than P-Touch materials.