Alright, I promised a while back to do a cooler on this review. My apologies for the delay, but here is my review:
I ordered the Mammoth Titan 75 (blemish) from Sportsman's Guide. With their membership (remember to cancel before a month!) and reduced shipping I can't remember exactly how much it was, but it was somewhere around $170, which was less than half of retail, and about $100 less than the next cheapest price I found at Walmart. Unfortunately I think they are now sold out of all the largest sizes.
The reason I purchased this cooler was specifically for the dimensions. I needed something that was less than 36" long and shorter than 18." This cooler, at 83 quarts, had the largest capacity out of all the options in my size range. Other coolers I looked at were a K2 90 (too tall) and a Black Rock 90L (too long).
The construction is good. Fit and finish is probably not as nice as some of the other brands. I can tell I will have to hammer the rod that serves as the hinge point back into place occasionally, as it slid just a bit during my one trip. The seal is not overly thick, but I have no concerns about it. The latches are nice. My cooler rests against the frame right at the point of the latches, which makes them difficult to get to. However, they have a nice t-grip at the bottom that gives you more to grab onto than just a straight latch, so that component makes them a lot easier to wiggle around and work with than they otherwise would be. Still not awesome, but workeable. The handles are okay-foam would be nicer. The drain plug is rugged.
The wall thickness is not great. The walls are not as think as either the Black Rock or K2 that I looked at. I suspect either of those brands, as well as several others, probably have better insulation and thus superior ice retention. However, I went into this cooler knowing that would probably be the case since it has the largest capacity for the outside dimensions (something's gotta give and in this case it's the wall thickness). That being said, the ice retention still seems decent. I had the cooler out for 5 total days and used two large frozen water jugs for ice, then filled the remainder with cubes. First day and night were quite cold - woke up to snow on the ground. The rest of the trip was cool with some warm times - 50s-70s. When I unloaded on day 5 there was still ice in the cooler. I think it would have lasted another day, for 6 days total, and then still stayed cool inside for probably one more day. My cooler management was normal. I wasn't leaving the thing open or opening it more times than needed, but also wasn't limiting the access to conserve ice. I also didn't pack it awesome. I would have put in less beverages and more ice, to include more block ice, if I knew I needed it to last longer. So overall with better packing and cooler management I think you could definitely get 7-8 days out of this cooler, maybe longer.
My only gripe with it is the feet. My buddy has one of these that he ordered as a blemish that came with the feet and handles, so that was what I was expecting. Mine came with no feet or handles. And I am so glad it came that way! The rubber feet on my buddy's hold this thing in place incredibly well. WAY too well. I'm sure they are great if you don't want it to slide around in your truck or on a boat deck or something, but I would much rather be able to slide it a couple of inches on my own instead of having it cemented in place. If he needs to scoot it back or to the side in his vehicle, he has to have a second person because it won't slide at all and the size makes it too difficult to lift both sides while you're hunched over in the car door. This has been an issue for him on other occasions as well. He was hoping the feet were just glued to the bottom and he could pry them off, but no luck. Each is attached by two inserts into two holes on the bottom of the cooler. He's too worried about losing insulation to pull them all off and fill all those holes with silicone. So depending on your needs, hopefully you could get one without the feet because they seem like a total pain.
Overall this is a good cooler and a great deal for the money if you can find a blemish. Having looked at some other options, I would say this is not as nice as the other high-end brands out there. The K2 I looked at in particular seemed awesome. It the kind of thing where you look at it and you can just tell it is a step above the rest. Very sturdy and solid. If I could have kept it I would have, even though it cost a lot more, but it just didn't end up fitting like I thought it would. Incidentally, I have the K2 90 for sale, practically unused, if anyone is interested. The Black Rock I looked also seemed a little bit nicer and better built. More attention to the details, etc. That being said, for less than half the price I have no doubt this Mammoth cooler is going to do just fine. It wouldn't be my first choice, and I definitely wouldn't pay retail price for it, but it's a great option if you have particular size or cost needs.