I recently put an Archery 365 SBS on my pse freak SP. The application makes sense, it's easily adjusted to balance the bow for offsetting the quiver and sight weight, while also adding more overall weight to increase holding stability.
That being said the added weight and increased dimensions of the whole bow package are fine on the range, but are negatives in the field while hunting. Whether those negatives are of any significance is really subject to the individual with regard to how and where you hunt...and probably how much you believe it aids your accuracy.
I doubt I'll have mine on when I go elk hunting, but I'll carry that setup while scouting some more before deciding.