There are many advantages to the Superglide platform that list includes easy removal and a clean bed in about 5 minutes if you have 2 folks or one strong one to lift it off the bed.
One of the disadvantages (the only one I can think of off the top of my head) is all the pins (see advantages above) adds a minor degree of "sloppy-ness" in the connection between the king pin and the frame mounts. While properly adjusting the slider stop will snub this somewhat, the very nature of the hitch makes it a bit noisier than fixed units that are bolted directly to the frame.
The new hitches are much quieter than the older hitches that only used lithium grease to move on the rails. The new ones have a plastic wear plates and that running gear is infinitely better and has far less tube wear.
PullRite has a SAFER, STRONGER, BETTER designed hitch for you
Lou and Laura with Bella - German Short Hair Pointer
2008 GMC Sierra 2500HD Crewcab SB Allison Duramax
2010 Flagstaff 8526RLWS - Superglide 3300
HAM CALLSIGN - KC3FFW