I've used the cabelas jet sled 1 for 3 years.
I'm very happy with it, slips along on grass & over logs just fine, sides are high enough that things stay in it OK when tipping around going over logs.
On snow or over frozen grass/ground it slides along effortless.
I will not go hunting without it (and my pack frame) in the truck.
When I bought it they didn't have the Jr. in stock or I would have bought that because it was a bit narrower for slipping through trees.
But I really have had no issues in that regard with the #1.
Personally I didn't want the XL, too big for me, I keep it in the back seat of my quad cab truck during hunting season and it serves really well to toss gear into until I actually need it to drag something out.
I used it just a few days ago to haul out cow elk bits in two trips, it's a god send for me & my back.
(that JR. one was on sale yesterday, my brother was looking at getting it, but looks like it's no longer on sale today)