Hey,
Just bought this kit and got four kitchen knives sharpened. All went smoothly, no issues with the tool. Bevel is consistent and knives are sharp - paper cut test was passed. Instruction is good and useful.
Here are several working tips I figured during the first use.
1. You will need a good box with compartments for stones - storing all metal parts together with brittle stones in a cloth pouch - is not a good idea.
2. Put a drop of viscous oil into the swivel and on to the part of the rod that reciprocates in the swivel - after the second knife I realized that these joints started causing friction and obstruct the moving parts. One drop of oil solved the issue.
3. Wet the stones with a brush during sharpening - stones dry fast.
4. Grit marking on stones has almost gone when I done with the fourth knife - it is obvious. So, before marking is gone, engrave or scratch the grit number on the plastic back of the stone - no guess-work in the future. See photos.
Brian 
Denis 
Great set 
