If you are happy with your 9000, then stick with it.
I've had the Perfect Balance pedal since January, and I can definitely say that I love it. It is incredibly smooth and articulate, and it works perfectly for my needs.
I've been on the journey to find a pedal like this for about 3 years before I picked mine up. I had an Iron Cobra Rolling Glide single pedal for 6 years, and I felt I needed something that wasn't doing so much of the work for me (I felt like my real pedal technique was lacking). I switched to a vintage Camco, then a Speed King, but found that they were not reliable enough for the continuous set-up/tear-down that I have to do (they needed a lot of maintenance to be used to their fullest).
What makes me love the Perfect Balance pedal is that it has the feel of a vintage pedal, with hardware features of a modern pedal. The folding feature of the pedal works amazingly, I've never had an issue with it.
But in thinking of getting this pedal, don't expect to have Jojo's technique with this pedal immediately. It is not like a DW9000, or any pedal currently on the market. It will not do all the work for you like most modern pedals will. You have to develop your technique to be able to play this pedal to its fullest, which will only make you a better player in the long run. It definitely doesn't have the same sense of power that a 9000 has, but if you're gigging, your kick will be mic-ed through a PA, so power and volume should never really be an issue.
I've let other drummer friends try it out, and it gets a very mixed response. Either its the pedal that you've been looking out for a lifetime, or its just not for you.
For me, its the pedal of a lifetime.