We've had the superglide for years.  Recently bought a new one which does not require the grease like the old one did. New ones have some kind of nylon material which only need a bit of wd40 sometimes.  A lot less messy.
The hitch (very heavy) works perfectly for us.  Cougar fifth wheel with Dodge short wheel base truck.  We've never had any kind of problem with the hitch, and it is fully automatic.  No pulling of handles to make it slide. Totally hands off operation.
 The only thing to be aware of is the limits of 16 degrees off center. If you park more than 16 degrees off straight line, you can't unhitch or rehitch.  That's the only drawback to the hitch.  We have had one situation which it caused a bit of a problem(retaining walls and trees in a pull through site), but I was finally able to get the camper in there, even though it was parked in an unorthodox way in the site. Alls well that ends well.
If we trade campers, I may opt for one which has the modified cap which allows sharp turns without a slider. That way we can use a regular hitch(lighter) and (no 16 degree limit).