Started installing my Slee sliders this week, been working on them in roughly 2 hour chunks here and there trying to balance cruiser projects with family time and husband duties around the holidays. Passenger side is completely installed and driver's side is prepped for install (holes drilled, rivnuts installed, all necessary factory bolts removed), should have the project finished tomorrow.
So far I'm extremely impressed with the quality and esthetics of the sliders, they fit the lines of the vehicle well and provide a very functional step in addition to their protection. Install has gone pretty smoothly so far, just time consuming especially without an extra set of hands - going to recruit my dad for the driver's side mounting after doing the passenger side by myself. Even with the help of jack stands it's a fair amount of weight and some awkward positions to get everything lined up.
I read a lot of install threads on here as well as Slee's instructions ahead of time and picked up some pretty useful tips, so I don't have much to add. I'll echo what others have said, drilling into the frame is not fun - especially the holes in the bottom of the frame (just hard to find a comfortable position to drill). I drove onto solid cinder blocks to give myself more clearance underneath the frame and that helped. I ordered two 17/32" drill bits (not from Slee) and both had dulled after just drilling the passenger side holes (used a 1/2" drill and lubricant). I picked up a 1/2" drill bit yesterday for the driver's side holes since I could not find a 17/32" locally and used it enlarge the factory holes before using the 17/32" bit, that actually worked pretty well - I'd recommend that approach to others. Installing the rivnuts was simple using the tool from Slee. I didn't have a 3/8" allen wrench for the hex head bolt that goes into the lollipop nut, I ended up buying a hex socket set that included a 3/8" hex socket and that worked very well.
If I think of anything else helpful I'll add it after I finish the driver's side install. Here are some pictures of the sliders straight out of the box, A+ to Slee for the packaging job.
Here was the cinder block set up I mentioned when drilling holes into the bottom of the frame:
And a few shots of the passenger side slider installed: