I have a Yeti Tundra 45, brother has a Yeti Tundra 65, buddy has a 35, and the list goes on. We all really like ours and they do their job incredibly well, but yes they're expensive as hell.
I've had mine for over two years and it's taken a beating in the bed of my ZForce/RZR/Truck, beach vacations, camping trips, and parties. The ice rentention is great for riding trips (exhaust and engine heat will significantly reduce it to about 2.5 days unless you use dry ice along with normal ice), but for me the real value is the durability. I basically was buying a $50-$80 cooler every year because the lids were breaking on them from sitting and standing on them. I've used my Yeti as a jack stand on the trail when the tire pops off a bead.
If RTIC had been around a couple of years ago I'd have spent $175 instead of $350 because they seem identical aside from the branding to me.