They tend to be really (REALLY) warm, even in cooler weather. I was out bird hunting in an old pair today, and I changed socs twice in 4 hours. Also, they don't seem to offer much stability- your foot can swim around a bit.
Also, the company recently received a fair amount of bad press for botched PR in a fundraising effort. It's unclear (at least to me) what exactly happened, but the company's own handling of it seemed less than honest, at best. So it makes sense, the agency that benefited is a very anti-hunting org. It seems Muck may have forgotten their customer base, for a while, at least. You can find way more info than you need on social media / Google.