I haven't heard or seen anything locally. The manufacturer of the kit talks it up quite a bit. Seems inexpensive and easy enough to do. I always hate cutting into a new machine....
I looked at them both, and I went with the Fastrax mod. I'm glad I did. This was my first D&R, and I was certainly nervous cutting into a near-new sled, but I wanted more track clearance, so it was my best option.