This was great to use and the smell did not bother me like some other products. The drains that I used this on are in a multi story condo building and have lots of bends and stuff to clog up the lines and usually they clog up again quickly. By treating them with this product it seems that they are not backing up as frequently. It also seems to be treating a good distance into the plumbing system before diluting.
KLpurchasingmanager via Homedepot.com San Diego, CA