I use them with my jag's cuz the fry clean up the mess. My ARTC loves them too, but he swallows them whole instantly, and its a bare bottom tank, so if there is a mess it's easy to clean up. I have found them to be mess tho and will turn the water orange if the fish is overfed.
I had some Tems that those were the ONLY non live food they would touch, so all my fish got hooked on them. But like everyone has stated above they make one hell of a mess...
All of my fish (jag, JDs, texas, FH) love these sticks. They do make a mess in the water, but the pleco cleans it all up, and sometimes the other fish do too.