I bought a 150g DX Valkyre yesterday. I decided to add a lightweight disc to the bag to try, never had one this light before.
After a few rounds of using this new disc, I have to say I have been very pleased. I am getting a few extra feet, probably around 30ft, off of the drive with this lighter weight disc. It turns a lot more than a normal valk, but does come back a little at the end. I threw pin high on a 320ft hole today with this disc, this is a big accomplishment for me.