its funny you two hang in the yammi section all the time & are the first to throw your opinion out there about how bad these sleds are.do either of you two own a yammi, i dont think so.mabey you should stick to what you know & if you cant ride a nytro in the mountain then you are one useless rider.as for the 2 sleds as in life its all about personal preference each of us like diff things so if i was you summit i would go rent or get a demo of each & let your gramps try them both that way he gets the right sled for him.i think the xp are a incredible sled just could not be happy with all the probs for that kind of money i hope they work things out because they have potential.as for the nytro yes its heavy but its a very fun sled,once the skid is dialed in to where it should be its a great all around sled but not a highmarker.