I recently built a large wall storage unit in my garage. Painting with a brush would have taken far too long. I bought the Wagner Power Painter Plus with Optimus technology. I am new to air-less sprayers, so first tried it out on scrap panels. I soon got the hang of the technique. I did learn that the machine must be kept level, horizontal, otherwise it sucks air as the paint container empties, and this causes spatters and blobs. The finish is excellent; smooth, even and clean, and paint delivery rate surprisingly high for a machine of this size. All in all a great machine for the money.