Just thought I'd share, this sprayer is very good for the value, but isn't the answer to your prayers. It sprays somewhat slowly, but allows you to evenly distribute the product over a room. Switch to the tip that sprays in a line rather than a cone.
For $50 you can't complain. This same sprayer sells on another website for $99. Just keep a 2 gallon jug filled nearby to pour more in as you run out. Northertool also sells a sprayer tip replacement kit. That kit has all the different tips so you can pick the one you like best. It comes with two, and I didn't like either of them. I'm planning on using this until I can get Jim's powersprayer... But for resi work a huge sprayer isn't always feasible.