I bought the 30" FlatMaster a couple of weeks ago for a project involving 175 cutting boards. It has turned out to be everything they claimed it would be. It is amazing how long the sandpaper lasts and does not clog. Changing grits is straightforward and easy with the hook and loop system. Mine came with excess deflection in the roller - either out of round or a slightly bent shaft - and they have agreed to replace it. I am using a 3/4 HP motor and it shows no tendency to bog down even with eighty grit paper and sanding a full 24" walnut tabletop.
While setting the roller height properly is critical to good operation, it is not difficult though it took a couple of tries to get it just right. Then all I had to do was change grits to increase or decrease the aggressiveness of the cut - no further adjustments were needed.
The unit is well built and feels very solid. I am pleased with it and found the people you deal with to be friendly and care that you enjoy using their creation. It is a fine addition to my already well-equipped shop.