I've had Goodyear Fortera TripleTreds on my Limited for about a year now, and have been through all kinds of weather with them. I replaced Michelin Cross Terrains, which were OEM on the truck.
I'm about 70 percent OK with these tires, but they aren't as good as I thought they'd be. All the Goodyear spec info, like snow traction, etc., is just marketing hype. The tires are OK, but aren't as good as Goodyear said they'd be. In fact, they aren't as good as the Cross Terrains I did have on the truck.
I wouldn't buy these again. But, the strange thing is that I have the GY Assurance TripleTreds on 2 cars (Hondas) and they are really great tires. They're the reason why I got them for my truck. But the truck tire is a lot different than the car tire, evidently.
Anyway, I have to say that the 4Runner itself is TERRIFIC in snow. We had our first real snow in the NE yesterday, and I had to drive on lots of pretty steep hills. The 4Runner was absolutely flawless on them, and they were slick roads, with people off in ditches and sideways in the lanes. Going up hills was a breeze. Coming down, not so much, because the traction of these tires isn't all that great. But, just take it slow, and it's OK. But I was more than just happy with my truck. What a vehicle!