Get it! Anyone who is over 50 and alone a lot should have a backup! We had a friend who lived 30 miles out, nearest neighbor 4 miles away and he in his 70s! He slipped on ice while going to feed his goats one morning and was about a football field away from the base unit. He pressed the button and said his prayers because he didn't think it would work. He had a GOOD unit! The neighbors were called and they went over, found him and said YES, IT'S REAL! Our friend had a broken hip. He is now OK, remarried after being widowed a couple of years and life is good.
You should do it for the fact that you take care of an infant frequently. It's not just you, but him also!! (As an aside, isn't it great having a grandbaby around?! We started "stealing" our when they reached about 18 months, and 15 years later we still "steal" them and go to museums, national parks, playgrounds, whatever.....