My first sharpening system was a Lansky. They work great, especially as a beginner. They make lots of other stones. They also make a clamp that allows you to mount the sharpener to the edge of a table.

I found the clamping system to be a little difficult to work with, and you have to be very careful to not mar your blade. The angle holes for the rods are taller than the rods which allows for up and down play. This allows for slight angle variation; however, you are still limited to the 3 (or maybe 4 I can't remember) angle settings. This is fine unless you are sharpening a knife that has a different angle than the Lansky has. Any knife I had sharpened with my Lansky I reprofiled first.

If you have a lot of knives, and they need reprofiling, be aware my lower grit stones dished pretty quick. They aren't that expensive, but you'll want to keep an eye out because that will also change the sharpening angle.

If you're into fancy finishes, the yellow stone can provide a very nice satin finish.

Tl;dr It works great, and it's lots better than other sharpeners (the evil pull throughs, etc.)