This has to be one of the best levels I've used. I'm construction electrician, so my tools tend to take a lot of abuse.  It's magnets are very strong you really have to pull, to get it loose, so it won't be  falling off when you have your hands full, it's vials are large and easy to  read, which you'll appreciate when there isn't alot of light.  When I think  of the money I've spent on the cheap levels, that have taken a dive from  40' up, I wish I had bought one years ago