I bought a bag of those but was having to modify them anyway, replacing sinkers, but liking the slider part. I use tungsten sinkers for their super sensitivity and smaller profile, at $2-$3 apiece for 1.5 oz sinkers. Even at that custom rigs are cheaper. I can tie one up in about a minute. I also like using the Betts C-rig floaters that keep a worm off bottom better so I can get away from having to choose from floating worms for C-rigging over short weeds. Lastly I prefer the best ball bearing swivel available, and have hook & bead preferences, no glass using tungsten, but brass beads are great noise makers.
Jim
Jim