Used the JPX in the Comp. today ,real conditions. It felt very comfortable to swing with a nice looking flight ,no fades. Perhaps a tad to high and 10 metres short of normal length.
I use a soft /super soft ball and tee it fairly high.. Twice  I tried to muscle the club and had a hook.
If I could lower the flight a little or get a more penetrating flight .
I am loath to play around with the setting so soon (10.5 ,weight on fade)so will try something like a prov1x on a lower tee and see what happens. Overall very comfortable in decision to buy.