I actually bought this item for my very independent 91-year-old grandmother-in-law. She has some limited mobility in her arms, is very large-busted, and has an extremely hard time putting on her bras. She has had this item for two days and has told me it really helps. I haven't had a chance to talk to her about specifics. I personally tried using this (over my clothes) to see if it would work for her. I do not have any limit to mobility in either arm. I definitely found it useful for not having to reach around your back while holding one end of the bra. I'm not sure how easy it would be to use for someone who had no use of one arm or hand, because I had to use both hands (but then again, I'm not used to doing anything with only one arm/hand, so take that for what it's worth). I think this is a very uncomplicated and helpful little device, and it telescopes and folds, so it would be easy to carry in a large purse if, for example, you had to take it to use at the doctors office or on vacation. I think if putting on your bra is a source of anxiety or frustration, it's definitely worth trying this item.