We have older well made cabinets that we didn't want to change out but needed to improve access to lower shelves and these worked great. We bought a couple of different styles depending on what we were storing and used these in cabinets for household stuff, light bulbs, trash bags, etc. and really liked the solid bottom so smaller things don't fall through. That said they do reduce the volume in cabinets (all of these roller things do), but we can now access everything without getting on our hands and knees.
Rating: [5 of 5 Stars!]