These are highly useful, good quality. The author makes it very clear exactly what you're receiving. I found it easy to implement these in the VTT of my choice (specifically Roll20). The fact that each object is labeled with its dimensions in inches/grid squares is essential, nothing annoys me more than having to manually figure out the right dimensions to get something to fit.
I think it would be helpful to have more blank objects so I can do a bit more customization, but I've used them in multiple campaigns for over a year to great satisfaction.