Wagner power painters...?

Any good? I saw a dude use a cordless to spray tool dip on a car!!! Looked like it was a decent sprayer and cordless to boot. Ill most likely use a corded one but I remember the last one I used 10 years ago was pathetic, could only spray water thin stuff like stain, latex was out of the question.. along with its quart size hopper....But this one I saw was a monster. Will be painting an exterior wall that is texture coated so a roller is not going to cover it. Any opinions?
http://www.thefind.com/hardware/browse-wagner-power-painter-review