Yeah, sure, they have a mustard ton (ETA: hey, it could be a thing someplace other than just my dreams...) of novelty mustards that range from the ridiculous to...well, the more ridiculous.
But they also have a pretty impressive representation of the best prepared mustards available.
Have visited (over the years) about 5 or 6 times, all pleasant, informational, and productive (bought some goooood stuff unavailable elsewhere without lots of leg work on my part) visits.
Staff / owners are sweethearts, IMHO.
Definitely an unexpected gem in the Madison area.