I have been using these things.
They are similar to the Jessem in concept, in that you mount them on the fence and you can angle them towards the fence. With the ones I have, you can independantly adjust the spring tension, the hand out from the fence, the angle of the wheel in relation to the fence (including zero).
You can also determine if you want the wheels to roll in one direction only or in both directions.
They work well for me and I find that I like using them better than a featherboard in many situations. The wheel angling does help keep the stock against the fence. They are somewhat bulky. Despite their bulk, I find that in most (not all) situations, they can be positioned in a manner where you do not have a problem with using a push stick and they won't interfere with a blade guard.
The Jessums appear to be very sturdy and more compact than the ones I have. I also like the way they attach to the fence. I would certainly be interested in them, however, I think the price is too steep for me to abandon the ones I already own.
Funny thing is I ordered the Jessem Clear Cut guides for the router table a few weeks ago and they will be delivered on Monday. (Jessem was moving and I had also ordered the paralign dowel jig and one or the other needed held up the order.) I ordered the Clear cut guides because I like the wheeled guides I already have for the table saw so much that when I saw the Jessem guides for the router table, I knew they would work in situtaions where I couldn't use the other guides. Now Jessem comes out with these table saw guides.
I have looked at my Incra table saw and router fence set-up and it definitely looks like the Clear Cut Router Guides are better suited to attach to the Router fence while the Jesseum table saw guides look like they will work better for table sawing. Hopefully, they can get the price down a bit closer to their router guides.
