I have one of those servo sensors that use a microswitch at the end.

The printer has a sturdy frame build from extruded aluminum. That probably makes a lot of difference. I can take the printer, move it into some other surface, turn it on and print, without leveling issues. Before it I had a wooden one without autoleveling. That one needed leveling before each print.

A few tips that made my prints much better:

• Check if your rollers are tight enough. None of the axes should wobble if you pull on them
• Use a PEI sheet for printing
• Clean the PEI Sheet with Soap and Water at least once
• Clean with IPA after every print
• Don't touch the print bed. The oil on your skin really doesn't help with sticking.
• Get yourself a metal feeler gauge with 0.2mm. Level your bed heat nozzel and bed to your normal print temp an then move the nozzel 0.2 mm above the bed. Adjust your Z Offset until you can get the metal gauge undr the nozzle but still feel it touching. that should be your perfect height
• If you still have problems try all the steps here one after another: https://teachingtechyt.github.io/calibration.html

I used to have a lot of problems with parts lifting up or my prints being unclean but since I did this my prints look great and stick to the bed.