OK, I bought this in August to Stain my Cedar fence. I LOVE IT!! My neighbor has the same fence,albeit his is twice as long. It took him, his wife and a guy they hired 25 hours over three days to stain their fence with rollers and brushes. Including sweeping clean I got my fence stained in JUST OVER AN HOUR!! It's great for outdoor use, I don't know that I would use one inside as there is spray and even being outside I could smell nothing but stain for about three hours after.