We didn't order the porterhouse, but we had a great meal there. I had the filet and DW had the new York strip. Both steaks were cooked perfectly and seasoned well. They have onion rolls with the meal which were terrific. We split an appetizer and a dessert, and while they were both good, I can't remember what they were so not that overwhelmingly amazing.
The steaks aree aged right inside the door (sealed) when you enter the restaurant, which is cool. I'm not a big fan of dress codes, but unless it is LC or HBD or CRT, we save our signature meals for non park days and always go clean and I wear a golf shirt and nice jean shorts. However, many will be wearing tshirts and other park attire, which really doesn't bother me.
I think YS is great, but it has not vaulted itself into the must eat restaurant. When I say must eat, that means I would travel there from any resort in WDW. So far, Fulton's and Narcoosee's are only on that list. But, I really like seafood and we haven't ate at the S&D restaurants or V&A yet. We would return there when staying at BWV or BC. We enjoyed it and it was worth the two TS credits.