I have used a Lansky for years and it has always been my go to sharpener but does take a bit of time to use.
As Drhorsepower mentioned, I recently bought a Work Sharp. It got rave reviews on iFish. I sharpened 20 knives in my wife's kitchen drawer in an hour. Every knife would shave paper when I was finished. I think anyone could get a knife shaving sharp with this thing in only a few minutes.
The Work Sharp is basically a mini belt sander that uses:
80 grit belt, not for normal sharpening use
220 grit belt, this is the primary belt for sharpening
6000 grit belt, this polishes the edge, much like stropping with a leather belt
The Work Sharp won the 2011 Popular Mechanics Editors Choice award. It gets very high reviews on Amazon. I bought the last two in my area just a few days ago, they are very popular here. The factory is 2 hours away in Ashland, Oregon.
The negative on the Work Sharp you most often hear is it can potentially damage the point of the knife if you are not careful. Maybe some users are using the 80 grit belt?? Since this is a mini-belt sander, if you let the belt dwell in certain spots, it is going to sharpen the blade more in those spots. If you let it dwell on the tip it's going to round it or heat damage it. This seems to be solved with good technique. The proper technique is to insert the blade, start the Work Sharp, and stop it just as you get to the point of the blade. I am super impressed in the way it can get a knife sharpened in a hurry. Here is a You Tube video:
This has given me an idea, use the Work Sharp for quick sharpening, or on the road (with an inverter). Also set up a small 1" x 30" belt sander in my shop. This would give me a similar platform used by certain professional knife sharpeners. The wider belt would give better control on the sharpening process. A guy who professionally sharpens offers a belt sanding kit for about $200. Here is the link and a video of him sharpening with it:
I think this same "kit" could be put together for about $100 to $120 as follows:
Harbor Freight 1" x 30" belt sander: $39.99 (appears to be the same unit sold in the $200 package above)
Surgi Sharp 1" x 30" stropping belt from eBay: $27.00
Polishing compound: ??
An assortment of belts 320, 400, 600, 1000 grit: ??