We have A 50% share and bought our 3 bed house worth 320k in 2017. No regrets for us, it is a house we never want to leave in an amazing area and we could never have afforded to live around here otherwise.
I think my opinion would be different if I lived in a development or blockof flats and had to pay maintenance etc, ours was a resale so rent hasn’t increased by much over the years (I’m assuming they can only increase by so much a year?). Our rent on 50% is £190 a month, we put down 16k deposit and paying £490 a month on mortgage of 144k
we do plan to buy the other half eventually. And yes it is all up to the owner to do repairs etc which we don’t mind as we know we want to live here forever.
got family living very close by on new build estate and the rent on the other half is astronomical, so I would advise if anyone is thinking about SO to look for resale properties! They are usually listed on the housing associations website, our house has needed a lot of work done but was livable and 3 years on we have done loads just the garden to look at then the kitchen in about five years time.