I've been terribly fond of the APS2 system over any other, even the VSR. Mainly due to the sheer ruggedness that platform provides, along with the accuracy you can achieve with careful upgrades and the like.
Its heavy, though. A lot of people dislike that and considor it a 'con' of the rifle. But atleast I can take assurance of having a tumble with it, and not have to worry about it snapping in half.