Very good overall. Provides accurate readings and I find the built in spirit level very handy. There are just a few things I would like to change: 1. It would be great to have a second 90 degree. Level 2. A bit heavy so difficult to maneuver especially with one hand when trying to draw a line or something.3. Constant hum from the digital block when switching on.4. It is difficult to draw precise angles due to the rounded end of the device. So, for example, if you want to draw a line at a certain angle that intersects another line at a certain point, this tool may not be suitable. It could be if there was a built-in laser projector. Wouldn't that be great?