Sorry, I don't own one, BUT, I looked at several links where the booth is sold, and given the axiom that "opinions are like rear-ends; everyone has one and they all stink", I thought I would offer mine for consideration.
1. Although the fan appears centrifugal (ie, "squirrelcage"), the cfm ratings of the fan are not given. Red flags should go up.
2. The booth itself is only a couple inches long. This typically reduces available capture area in front where painting is performed. My guess is that painting would have to occur within about 3" or so of the first stage "honeycomb" filter. Because painting occurs so close to the filter, expect air vortices (swirling effect). It could be the honecomb filter is an attempt to try to make the air flow laminar, or to reduce particulate velocity to ensure deposition on the filters. Second red flag is now flying.
3. There is no indication (at least from what I could find) that the booth can be ventilated indoors. Unless the booth is equipped with an activated charcoal filter for the purpose of adsorbing solvent vapors (like some of the downdraft booths on the market), ventilation systems should always be exhausted outdoors. What's funny is an accessory attachment for doing that. It looks like a vacuum cleaner crevice device that is placed between the window and the frame. The only problem is that it restricts airflow, and increases backflow pressure in the system, reducing exhaust efficiency. Fortunately, that's an option. Stay away from it.
FWIW, I don't like the design, and I think there are better systems on the market for about the same amount of money. However, I'm only going on what I can see, and based upon a limited amount of research. What would be interesting is if you could post a review once you've had a chance to set up your booth and use it. I would be interested in any positive or negative outcomes.
Gip Winecoff