I had no trouble cutting most of the holes in the ceiling, except for two holes that happened to be where the drywall meets. That is, with effort, cut through the seam that is located between the sheets of drywall. I had to use a knife to finish the cut. The dust collection tray worked well, with very little dust to clean up afterwards as long as the tray was kept flush to the ceiling.
I am an electrician and have used this tool several times to cut different sized holes for electrical ceiling boxes. It works great and saves a lot of time compared to using a hacksaw. The only complaint I have is that although I've only used it to cut maybe 4 or 5 holes in drywall, the blades seem to dull very quickly. The tool hung several times on the last hole I used it on. I ended up having to try really hard not to snag it, which took a lot longer to finish the hole.
I was renovating a house and needed to install about 20 ceiling boxes and speakers. This tool proved to be excellent throughout the project. === Good material ===* It cuts perfect holes in 1/2" thick drywall for 6" lights. I used a brand of commercial lighting from a large orange store. I don't remember which setting I used, but one of the presets matched the template perfectly. Once set up properly, all the holes came out perfectly (except for the one that got stuck in the rafters. Oops).* The