Bests & Worsts Reviews from Amazon

I bought this unit based on the good reviews of it. While it seems to be a fairly well built system, in my two uses of it, it has leaked both times! The first time I put a gallon of weed killer in it. About halfway through my spraying session I started feeling small drips on the back of my legs (wearing shorts). My wife was out in the yard too, so I asked her to take a look at it while I was still wearing it. She thought it was probably just condensation, so I kept going. While taking it off, the sprayer hose was fairly wet, so I decided it must have leaked a little. The next time I used it I filled it with 3 gallons of weed killer. This time about 20 minutes into using it not only did I feel liquid running down the back of my legs again, I felt the waist band getting wet in back, and there was a significant amount of liquid running down the hose. I took the unit off and saw that there was a steady drip coming our of the bottom of the tank. In looking at it closer, it appears that the plastic clamp that wraps around the neck of the tank doesn't clamp adequately. By this time I have weed killer running all over the place including on my shirt, my shorts, the garage floor, etc. I plan to try to replace the cheap plastic clamp with a metal hose clamp, but you shouldn't have to do that, especially with the "pro" model. While a back-pack sprayer is a very convenient way to spray, the big downside is that if it leaks, it's going to be running down both your back and the sprayer hose. I really don't like the idea of weed-killer getting all over me!! If it wasn't for the leaking problem I would really like it.