Actually, I think those are the ones that I had last winter. And I do agree, that model of boot was a piece of crapola. The lining came out and then I couldn't get my foot out because it kept getting stuck!! Haha. Frostbiters were great, Icebergs are great. Not those though.
Here are the Ariat Icebergs that I have now that are absolutely amazing. They have a zip up the back and are very easy to ride in : http://www.equestriancollections.com.../AT00414-a.jpg
Here are the mountain horse ones I had that were so crappy. They are called Rimfrosts: http://www.fourwinds.net/engcloth/bimg/mw861818.jpg