I tried one once ... but I just couldn't fit in it.
Auggie loves his though.
I'm not very familiar with the claims that it could affect their hormonal behaviors - I'm rather skeptical (very highly skeptical). Many things affect hormones, but a soft bed is not likely to be one of them - unless it is really that just being in a horribly uncomfortable bed makes one depressed, and if that's the argument I don't see it as a good anti-hut argument.
The better arguments against huts tend to focus on safety issues. There is the possibility of birds getting caught up in loose threads. I think this is a valid concern, but often blown a bit out of proportion. I am very sorry for anyone who has lost a bird in this manner - it has happened to some. However, it is relatively rare. It is possible that a cage could get struck by lightning, but that does not stop me from using a metal cage and putting it by the window.
We need to be responsible for and aware of everything we put in our birds cages. Check the huts regularly and trim any fraying threads. But what I really don't get is when someone says they don't use huts because of the risk of these loose treads, but then they use a cozy corner or some other plush toys ... perhaps I'm missing something, I must be, because that makes no sense at all. If the danger is from fraying fabric huts are no more dangerous than any other fabric item.