I liked my old one but it got dark and I couldn't see it in the mirror. Excellent level, large and well visible even when you are in space. It really reduces the workload when you can see when your trailer is level. Each mark on it corresponds to one inch, so you can easily see which side needs to be blocked. I would bet five if the old one didn't let me down as this is the same. So I bought it again knowing this is a possible bug!