No harm in demoing, but I'm more interested in the new blades. My gripe with the current model is that Feel Flex is great if you're not using the racket at higher swing speeds consistently. It gives a little boost in power for low to mid range strokes. If you are swinging harder, the feel is much more harsh and power starts to drop off on the top end. Much more noticeable in the clash. If he has flatter strokes the 100 could still be a good choice but I wasn't confident against a ball machine with fresh alu power haha.
I'm loving the ezone 98+ right now but power is a bit high. It's quite a change from the blade and I'm seeing if I can get used to it. I liked the pure strike for the few minutes I was able to use it as well but I'm recovering from surgery.