Hey all! Just thought I would chime in with my experience switching to the GT98 recently.
Quick 2 year racquet history (my favs) since getting back in the game:
Prestige Tour Aux->Radical Pro Aux->PSVS->Blade Pro->Radical Pro Aux->Extreme Pro->GT98
Demo'd the GT98 and immediately ordered 2 matched frames.
To me, the GT98 is like a more user friendly Blade Pro. I find myself feeling right at home with it because it provides power, yet that power is easy to control thanks to the flex and the dwell time of the ball on the stringbed. It is one of the best frames I've used on my one hander. I was worried about the wide pattern, but it's very consistent and predictable. Out of all the sticks I've used, this one is my favorite in terms of how it balances playability and ease of use (for an experienced player) with feel and comfort. It helps me out when I'm on the back foot, and it is ready to go when I want to step on the gas.
Trying to get used to the more HH balance, great on groundstrokes, challenging on the serve.
Frames play absolutely great in stock form, but might try to slap leather on one and see if I like it better.
Still testing out different strings, but thinking a semi-firm or firm poly would probably work best.
My frame specs unstrung w/plastic:
306.45g, 6.5 HL, 295SW
306.74g, 6 HL, 295SW