Strait-Flex Tuff Tape Corner Rail Drywall Plasterboard Joint Tape Made in USA 20 m

I wanted to level up a 45 degree uneven angle on a join between the ceiling and wall that had been painted. It would have been easier if on fresh drywall. I had trouble with the plastering to hold it in place and cover the edges. If you only want to neaten the join and it is level, it's a good idea but it won't correct a bad off-angle and it need two or three coats of plaster to feather out the edge. Having said that, in the right hands it would do a good job. I watched lots of YouTube videos which made it look easy, but you need to practice. The big advantage is that it is easy to take off, clean and reapply if it goes a bit wrong and you can also sand it which you can't do with paper tape.