Does anybody have significant experience with Wiggy's sleeping bags? I bought them for me and my wife this year and they seem really good. They have the hollow tube synthetic insulation but it has a big difference, they say you can leave it compressed in the stuff sack and it will not hurt it at all. They also WANT you to wash it after every trip. Oh ya, they also have a lifetime warranty. I was wondering if anybody has left them stuffed for long periods and washed them often, if so, how have they held up?