I've used about every tool made in the last....ouch....50 years.
This tool is not perfect, but it surely is my favorite.
Here's why:
Lightweight: The old
Prochem tool feels like a boat anchor in comparison.
Clear head: This is a bigger deal than some might think: This allows you see how much moisture AND residue are left. This tool changed some of my training techniques when I saw that it is nearly impossible to remove a shampoo preconditioner from fabric without overwetting it. I switched to encap products for most of my neutral pH preconditioning after that.
Rounded
glide: Velvet and chenille fabric are not left nearly as distorted with this tool. The amount of time grooming and softening needed after cleaning natural fiber textures is much less with this tool because of that feature.
Things I'd like to see improved: The solution control valve is to easily moved around during use, even with the cover. A tighter valve should be used on the tool. I also liked the 1.25" vacuum hose used on the Prochem and Kleenrite tools better than the 1.5" hose they use on this one.
What I don't think they can do anything about is the fact that it isn't as easy to use in tight areas as, say a "HyDry" tool is. When I clean for "friends and family", I have a 3.5" one that I use for those areas, or I just use encap and a towel, depending on the fabric and soil level.
That's my 2 cents.
Still, its my favorite tool, and the only one I'll use in training (other than the 3.5" Hydry and a crevice tool).