Ceiling hoists

We have been visited by the OT who thinks we should be thinking about a ceiling hoist, one for the living room and one for the bedroom to en suite bathroom.  Does any one have any experience of these and do they have any advice on what facilities I should be looking for?  OH is confused,  doesn`t walk now and is less and less able to stand even with support.  What future requirements should I try to cover with a hoist?

Thank you for any advice you can give