The Sharpmaker really does grow with the user. Anybody can swipe out forty strokes, but eventually you get a feel for the edge and know when to go all out, and when just to take it lightly to polish an edge. I have the ultra fine stones in the mail right now, should be here tomorrow. Nothing beats a dedicated stone for freehanding, but the option to lay the rods down like a benchstone is something some forget.
Where it really shines, is that it really can sharpen anything. I mostly use Wharnecliffe blades for everything, but my friends have me sharpen their serrations, recurves, and hawkbills constantly. I wouldn't mess with a purposely chisel ground plain blade, but doing both sides of serrated blades can really improve performance. It isn't the end-all sharpeners for the elite hair-splitting crowd, but it's a good start and can be taken pretty far.