I have been using a similar laser level for 6 years or more. The only real complaint is that as a "self-leveling" laser level, I would expect the laser level to be accurate on any surface that is 5-7 degrees off level, and this laser level would self-adjust like the laser level I have . was before. This spirit level can only be adjusted when it is on a surface that is less than one degree from level, or it will flash to indicate that the surface it is sitting on is far from level so that the spirit level can adapt to it. I can handle it, but I don't like this feature of this level because it's harder for me to set up. I will say that this level seems very accurate as long as you place it on a reasonably flat surface (when unlocked). If I'm missing something when setting up this plane, I would find another plane that is capable of finding the plane even on a surface more than 1/2 degree from the plane.
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