I have the Eskimo Quickfish 3 and the 6. Only issues I've had are that I broke 2 poles and had to order replacements. You have to watch how you open it, if the poles are bending funny, don't force it. Let it back in and start again. Also when you anchor it, don't force it to a certain position. Let it sit where it naturally wants to. I think that led to my poles breaking.
I've heard of some guys having to chase theirs down because they choose not to use the ice anchors and instead just pack snow around them. Might work on a nice day, but on a windy day better anchor it down. Not sure if Eskimo makes an drill adapter for that or not. I bought a Clam one and modified it to use the Eskimo anchors. Granted the Clam anchors would work fine too. They go in quick with the cordless drill.
They could make the carrying bags bigger. Once you have ice froze on the shack, enjoy getting that thing back in the bag. I usually toss it in the back of the truck as is.