I believe only certain countries have the S7+ available now. As far as the US, not until the 18th. Press/Youtubers may have the retail product early next week for full review.
I got my S7+ today and I'm trading in my Tab S6 to Samsung cause they offered $450 trade-in. I like way better. I love the 120hz display and the bigger screen. The finger print scanner on my TS6 was garbage, The TS7+ one is a lot better. The camera is better and actually has a flash this time also.