To say I fish a lot would be the understatement of the decade
so my gear gets put to pretty hard use. Last year I decided to go with a 4 man shelter made by the ground blind company killzone because it was a lot cheaper than the clam or frabil ones were. So far it has held up great, this will be its second year on the ice so I will see if it continues to hold up to fishing several times a week like I was doing all last year.
On the pro side it was cheap (about $130 with shipping) and has held up nicely so far, on the con side, their idea of 4 man is my idea of two guys plus all their gear inside because who wants to go outside your shelter to grab something? not me. It fits me, the GF and my two little boys nicely though so maybe if two of the "men" are under 12 it is a true four man shelter.
I am not sure how it stacks up to a clam or frabil quality wise because I haven't had the opportunity to check them out side by side. I imagine something about it is cheaper for sure or how else could they get by with selling it for so much less? but for what I needed it works great.
One tip on something that has worked great for me. When setting up in the wind you need to get at least one ice anchor in right away and you want to get the others in as fast as possible so I carry one of those old hand drills from before power tools like what you work with when you are building a cabin with no electricity etc. and I have a drill bit in it that is a bit smaller in diameter than my ice screws and I use it to put starter holes for my ice screws in to the ice. Lets me get my shelter up even in high wind relatively quickly with a minimal amount of swearing and no need for batteries