Oh man.. you're going to get both sides of the fence real quick I'm sure. Do a search on the subject and you'll see. For the most part you'll get those that think about what kind of boat it is based on whatever, and then you'll get the owners coming in.
I have a US25 and I love it. Great boat. Very well balanced, sails well, lots of space, big cabin with slightly smaller cockpit in comparison to others. I wish I could stand tall in it but I would assume a 30 footer wouldn't have that problem. I would recommend them because they have gotten a bad reputation for some reasoning along the lines
that they mimicked the buccaneer or something.. can't remember now. So in turn they are lower in price. Win win for a buyer.
Get it looked at though, like any boat. Other than that I would say go for it if it's all good.