I have used these for about 5 years now, they are more professional looking than a pump sprayer, total purchased in that time = 4 and with full time use my 3rd finally broke, switches last about 6 months, handles are weak, they do leak after a while. The price seems a bit high, $400 - $500 for what the product is. Fixes could be a more secure battery with easier access to repair, stronger handle. I think i'll look for a competitors model next.
Rob