I've been playing the new Mizuno JPX 923 irons for awhile now. The JPX 923 Hot Metal Pro, the JPX 923 Hot Metal, and a newcomer to the family - the JPX 923 Hot Metal HL (High Launch). And the common theme with all these irons is ball speed. Seriously fast ball speed. In fact, these are the longest JPX irons of any I've ever hit, hands down.
But there's more to this new JPX 923 line than just Nickel Chromoly speed. All three models are extremely playable, even the Hot Metal Pro (HMP) has fantastic forgiveness. And the ability to blend any of these irons seamlessly into a mixed or combo set will give players all kinds of options that fit pretty much every skill level. In a nutshell, the JPX 923 irons are the most fun to hit JPX irons of all time.