I got a Cafe'sque seat that fit on the stock pan for my 76 CB550. It's good not great. You get what you pay for I think when it comes to seats. I paid over three times as much for a Corbin seat for my F and feel like that one will last the life of the bike. The ones from hondaclassic31 are a short term, decent looking, accurate fitting seat. Got in within three weeks. Haven't ridden on it yet so can't speak to comfort.
Overall a decent seat for the money but not up to stock specs or Corbin or probably a local upholsterer.
Respect
CD