Impractical, imprecise

The "wheels" that allow you to move the guide on the stone are not perfectly round (or focus), so that the guide waves on the stone. As the stone is not completely flat either, the behavior of the blade guide assembly + is surprising ...

The blade is not held laterally, we must take a square to place this blade. The clamping screws are not enough to hold the blade firmly (there are plastic caps), it is necessary (especially with chisels a bit narrow), constantly check how the placed and if it is still to square.

The stone itself has 2 faces, a clear and a dark: it would have been much to report which has the finest grain. This is to guess.

The documentation is more succinct and not with it we can use this set effectively. He who knows sharpen probably did not need the doc, but probably not the oilcan or that stone.

Oilcan: it is quite handy but it is not stated anywhere that it was oil, so you have to guess (test).

In short, go your way and find something more effective: that maintains the blades sideways.