When I had my breast cancer surgery last fall I bought 4 or 5 of these. You step into them, they don't hook anywhere. They came in small medium large and extra large it was sort of guess and by golly for sizing.
I still wear them occasionally but I call them my blobby bras because that is pretty much what large busts turn into in them. They've never ridden up though and they stay in place in the back, two good points.
Very comfortable, but I don't care to wear them out in public. I have enough trouble with stubby and stretch without adding blobby into the mix.
I think the next step is sports bras, same style but firmer shapes if that makes sense.