Carepeutic Ergo-Comfort Foot Rest

It's pre-set settings are just a bit too high or a bit too low for me (not at a perfect level). Also, the bar below sometimes slips out of place and the stool suddenly collapses at unexpected moments. Shocking when it happens! I also don't like the rolling part of the surface designed to massage the feet. I use it at the office so I don't use it for that so my feet sometimes slip off the surface.