Having slightly struggled to sell my Mum's flat, and regularly railed at the management company over increased costs and speed of repairs, I do get the hate for retirement complexes. I still don't entirely see what the alternative is for a lot of people though.
A previous poster mentions with disgust that the complexes they mention are near supermarkets, but surely that's the point? They are built with access to shops, doctors etc.
When my Mum was looking to downsize, the alternatives were that kind of complex, or a small house in a modern estate, not near enough to amenities and offering the likelihood of barely seeing another soul from day to day as to many they are starter homes of those who work full time.
The peace of mind of knowing that she was regularly 'checked on', seeing people for socialisation and there was someone on hand to alert me to get there in an emergency was worth every penny to us, I have to say. It took 10 years off her when she moved in.
Perhaps its different for those who are very fit and healthy (although Mum was very independent to her mid-80s, despite health issues) and still in couples. For some though, they have their place.
As the youngest of four children, with no children myself to worry about leaving an inheritance to, I certainly wouldn't discount one in the future - and if my neices and nephew find it an inconvenience, they can always refuse any inheritance I haven't already managed to spend!