Don't wait too long. Get it early
This is a good concept, but it's hard to teach old dogs new tricks.  I think if my dad had this about a year ago before he got in real bad shape he would have adapted to it and it would have worked great.  Once u realize he is going several  times a night, get this device don't  wait until he can't stand up any longer.  The downside of this device is the plastic hooks to hang the bag.  The very first day the one side broke off so it can only hang by one hook.  They need to make this part in metal.
Rating: 4 stars