I have no experience with them. They are probably fine. Lowes in my area sell them. Most products are roughly the same price. One or two items are slightly less and there are a few that are more then what I sell the chems for. I'm a retailer and could care less about them. They aren't a real good value for the price and the guy at lowes isn't going to know what to put in to fix different problems. Not sure who else carries them. I'm guessing they will be offered on Amazon soon if they aren't already. If that's what's nearby for you as far as chems then give them a try