Easy to set up with clear instructions. Sharpened my first chain and measured the cutters with a digital vernier caliper - significantly less variation than on a brand new chain I just put on the saw. This will pay for itself in no time when you consider the cost of taking your chains to be sharpened or replacing with new. You can sharpen a chain in minutes, but I tend to be a little patient and check each cutter as I go. Not as noisy as I expected and very little vibration when mounted (I mount mine on a rubber mat on top of the work surface). Highly recommended.

Very easy to use, surprisingly quiet, does exactly what it says on the box

Works well