Anyone experiment with Aluminum or Brass sticks?

[centersnare]

There has been various ways of drummers using weighted sticks over the years. Many drummers nowadays practice with aluminum or brass sticks to help them gain more speed and endurance as well as building wrist and forearm muscles. But many drummers and teachers who lean towards the 'old-school' way of thinking say these kind of sticks can hurt you and cause carpal tunnel.
Whats your intake on the argument??

Below is a video of Matt Smith talking about the Power Wrist Builders and showing us a warm-up excersise which he developed to gain more speed. He also talks about how they helped him him beat Manginis traditional grip record by hitting 1132.

[JoeyM]

I've been using these ever since Summer NAMM 2011 and they have helped me improve. I know in 2012 I'll be scoring higher thanks to these power wrist builders. But to those who plan on using them, go easy with them, dont push extremely hard... You'll do damage. So just go easy with them for 15-30 minutes a day at a comfortable speed doing exercises. The secret to these is "slower the better".

Joey.