I have a pair of the Jas Townsends straight lasted and find them fine to wear.
When I ordered them I told them my shoe size in Australian sizes and they knew the size to send. When you first get them and set the buckle they feel snug, after wearing them just once I found that I had to reset the buckle tighter as they do loosen up somewhat (about a quarter inch adjustment in my case) As for the straight last, yes it does feel weird a first, but I find no discomfort when wearing them. One word of caution, they are not a dress shoe, as in dancing pump. They are an outdoor shoe and are as heavy as good quality leather soled ghillie brogue. I also had the local cobbler put rubber heal soles on mine. I have also spit polished the toe area on mine without too much hassel