Overall, it is a good product.
In the illustrations of the "Product Manual", it does not show the coiled connector between the control box and the handpiece. If you try to operate the handpiece while the control box is in the stand, the control box and stand will fall over, because the stand is too light; however, it works fine if you use the belt clip to hold the control box.
I only used the "mandrel %26 sanding bit" with the lightest sanding band and it worked fine at 3,000 RPM for fingernails and 5,000 RPM for toenails.
In the future, I will need to order more of these sanding bands, but the manual does not provide any contact or website information to do so.
In the Operation diagram, it describes the lock/unlock, but the icons are so small that one needs a magnifying glass to see them.
If I were to buy one again, I would choose a lower RPM model, as the 40,000 RPM is overkill.