I have one that I use for acrylics and it works for me. Price was the main driver for me selecting this model. I don’t have anything to compare it to, but it does pull the paint down and filters it effectively. I use acrylics only and do not vent it to the outside. The first layer of the filter system seems to trap most of the paint. I’d recommend buying a package of the filter sheets - the first 5 don’t last long!
It’s large enough for HO models - I have painted and weathered a couple of locomotives and a number of freight cars at this point. An 80 foot passenger car would work but would be a little tight. I have found I could actually hold the model just in front of the booth rather than completely inside it and the booth still sucked the paint away.
One gripe: The bottom of the booth is sloped toward the opening. If you want something to be level inside the booth you need to make a support that will be level. I have a use now for all those empty freight car boxes - cut them at an angle and tape the part you are spraying to the box top.
One modification I made was to cut a hole in the top (the flat part) and taped a piece of plexiglas over the hole. I glued a piece of corner molding trim wood on the edge to stiffen it. I place a light there to give a bit more illumination. In my shop I have a flourescent light directly over the workbench so the booth had a shadow inside even with the window on the top.
At first I was put off a bit by the cardboard booth material, but it seems to stand up OK and it would be easy to replace. You could use it as a pattern for a masonite or plywood booth.
I checked it out when looking for a spray booth for the model shop but my cheapness over-road my decision to buy it. I made mine out of foam core board and cut a hole on the back for a piece of flexivent the stuff used on the back of a cloths dryer and put a small vent fan inline the kind u buy at lowes for boosting your hvac system. Took one of the pieces of glass out of a basement window and replaced it with a painted piece of plywood with a cloths dryer vent the kind with a damper or flapper. The whole shottin match cost me under $50 and works like a champ.
Based on your feedback I might just hold out for the MicroMark version which has a clear acrylic top and is made of metal. Similar design concept of 3 stage filters and downdraft air flow.
I just can’t see spending that kind of money on a paint booth. I built a 5 sided box out of 3/8" plywood, cut a hole in the back for a bathroom fan and use cheap furnace filters placed in front of the fan (the box has the same dimensions as one of the standard filters so the filter is a snug fit)). The fan can be vented out side with standard 4" dryer hose, if need be. The whole thing cost less than $50 as well.