They are a must to protect the censor, especially if you have multiple dogs.

We like the fact it is attached to our dogs collars, but the boot is difficult to take off and on to change the battery. We have three dogs and all use the MS-5 Collar. We had to order more boots because the rubber broke changing a battery

A must buy to protect the device nedded to open the door.

One of the back small rubber straps broke when I was trying to attach it to the collar. If I order another one it’s an additional $10 shipping fee. Disappointing

they do not make a collar adapter for a large dog collar. The largest for them is only 1 inch. That is for a medium sized dog. They should have adapters for 1.5 inch wide collars rather than just their product for little foo foo dogs.
Disappointed.