This is a great part. Only "problem" I had with it, was that i had to change which sides the belts were on, because part of the motor mount won't allow the front belt to be placed on the left side (left if you see the car from behind). Additional problem with this, is that you most probably have to file/cut off part of the inner battery mounts, or these will interfere with the new position of the front belt. This obviously leads to the battery not sitting properly, and it can easily bump into the front belt. This is easily fixable though - personally, I just took a couple spare pieces from the battery mount, and put them under the upper deck. (There should be plenty of spare holes in the upper deck to fix this).
I'm also not sure how this will work with 1 way differentials, since you have to flip the differentials to match the new belt positioning. (I never used 1 way differentials though, so it was never a problem).
A little extra work to make it happen. I'd love to see some new optional parts to go along with this though, make pre-made battery mounts to fit with this, but all in all a great product.