I bought a unit like this at CW before our last trip of over 5,000 miles. I did not use the attaching tape and silicon per recommendations. I use a 3M tape, double sided, red, from Home Depot that I have used at work to hold signs on buildings. The three dispenser unit works perfectly and I know the tape will hold up in the shower for years. The dispenser attaches to a mounting unit so I can lift the dispenser up to remove it. The entire unit works great and we did not have any problems at all with it. The only problem I have now is I apparently need to buy three more to hold all the shampoo and conditioners my wife thinks she needs. I hoped to get around the bottles all over the floor but I just must not understand the need for multiple shampoos. Otherwise the unit dispenses just fine. About three pumps for shampoo and the same for body wash.