I bought a pair of the SIXSIXONE 4x4 (or 2x4's) whichever where the knee/shin combo and I really liked them except that the middle strap doesn't fit around my calve muscle (really big calves). So, I ended up buying a set of Roach FR in XL and they're too long and rub the top of my feet.
I like the feel of both (haven't ever used the Roach's, just trying them on) but neither fit me very well.
Right now I'm keeping the 661's and trying to get rid of the Roach's.
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"Life is not a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather to skid in broadside, thoroughly used up, totally worn out, and loudly proclaiming, "WOW, What a Ride!" - unknown
"Your Bike Sucks" - Sky Yaeger