I've been playing with this a bit. Two demo stints for a total of six competitive singles sets and 3 competitive doubles sets plus normal hitting sessions.
Probably against the general opinion here but I am actually liking the frame more than the string pattern if that makes sense. Feels nice in the hand, swings easy, feels solid at its weight. I am considering trying out the non-S 99 now as the 16x18 might be just the ticket. Somewhere between the 99S and a Blade.