These Big Smith overalls are comfortable and durable.  This was my first pair of Big Smiths and I have been very happy with them.  They have a different design from Libertys, but they include a built-in pocket for my watch, which I really like, and - being as they are made of a slightly lighter denim than some other brands - they are comfortable right out of the box.  They have a generous cut, so they are not too snug around the middle.  Overall, I think these overalls are top-notch.