So I bought this carrier knowing I was about to make the trip of a lifetime from Anchorage, Alaska to San Antonio, Texas. Wanting something waterproof was key and this carrier didn’t disappoint. I used 4 totes inside the carrier bag and fit perfectly. Everything arrived dry which made me very happy since most was tools. THIS IS THE ONLY DOWNSIDE TO THIS CARRIER. WHEN LOADED BE SURE TO MAKE EVEN WEIGHT SIDE TO SIDE. As this carrier has a center rail/support, that ultimately is the other end of the hitch. The problem we had along the way was the carrier bouncing like a seesaw, side to side up and down. We stopped and added 2 more straps from the carrier to the hitch to alleviate some of the bounce. The carrier has a piece of 2” square tubing to support the carrier but it doesn’t go to either side like a cross for instance, leaving it bounce like a seesaw. One 2” piece of square tubing with 4 holes drilled at 1/2” for the bolts to go through, keep in mind the tubing is 2” and you remove half of that for the bolts to go through. It makes it hard to tighten all 4 bolts as they almost touch each other, but these have to be tight as possible. Overall I gave it a 5 star anyway. I was very happy it made the trip.