Easy to use, just set it inside the bowl and forget about it. Keeps the water in bowl blue and everytime you flush it helps clean the bowl. When I do physcially clean the bowl with a brush it's so much easier and it's not dirty with stuff on it since the constant blue water has helped the bowl clean. Note if you have a newer toliet with the 2 push buttons (1/2 strenght vs full strenght flush) you will need to put a wire hanger inside the tank to hook this bottle to so that is sits low enough in the tank to allow the blue liquid to seep into the water since those toliets use less water then normal. Careful NOT to stain your floor when adding one of these. The blue dye is hard to get off walls, floor if you spill it.

This is the best cleaning product for the price. This should be much more expensive and works better than an other in-tank item. Need more options in other colors or bleach.