Comments:
The pair of "heavy duty" plant dollies I ordered are being used on a brick porch, much like the one in the photo on the Kinsman website. The pots we placed on them are
about 75 pounds. The reason for getting a dolly with wheels is, of course, to be able to roll it as needed. My main comment is that these dollies are actually fairly lightweight, and as such prone to tipping when supporting a heavy pot and being rolled over an irregular surface (mortar grooves between bricks).
I would get them again only if they were to be used on a smooth concrete or wood surface. Kinsman's larger "Down Under Plant Caddie" (reviewed separately) is sturdier, able to support heavier pots and has a smoother rolling action as well as a lockable caster.
Kinsman's service was prompt and they have a great catalog of gardening supplies.