I have the Extreme Survival. It is a well-built very very strong and heavy blade. In my opinion, it is on the heavy side for carry on a backpacking trip. However, weight is not a problem if it is carried by a car. It splits wood well and the saw works well too. I like the sheath too but not so much the butt cap-hammer combination. It is a thick and handle-heavy blade. Easy to control despite the weight but not a chopper.
Hold one in your hand before buying to make sure that the weight is fine with you.
HM