I have not used it for anything dramatic lately. However I used to be limited at one time to one backpack sprayer because I was waiting on one to arrive at the dealer for a warranty issue. During that time I had to use it off and on for RU Quick Pro as well as pesticides used on shrubs. I was really concerned about doing this and was going to just buy another BP and incur the expense until my a lesco rep in Longwood suggested this. I was overly cautious about this but they ensured me all would be well if I did a good job cleaning it. I did. I would first flush with regular water, then the solution mix and then water again and water one more time. It worked without any injury to the plants sprayed during that week. I continue to use it every so often just to clean the backpacks out even though there once again is a dedicated backpack to just RU. However I find that sometimes the Quick Pro is not as water soluble at times and I end up with a oat meal looking residue on the bottom of the tank that can clog the hose if left unresolved. Overall the product seems to work well to me, but who knows if I had flushed the tank with 4 gallons of water it might of works just as well. The other thing I have noticed it is useful for. I use the lesco concentrate market dye for the RU. It is a pain if the bottle leaks and gets on your hand and you look like you have smurf thumbs for a week even with lava soap etc. If you use just a little of this on your moist hands and rub it does a pretty good job of making you not have smurf thumbs/fingers.