I have previously used the Thermarest Prolite 4 for packability and weight. I went to the Big Agnes in hope of something more comfortable with similar packability and weight. My first night in the Smokies we had an 8 degree night with winds about 35mph. Snow was blowing in the AT shelter, yet I had the most comfortable night I have ever spent in an AT shelter. The 21/2 inch pad was wonderful. My second night out I got another wonderful nights sleep. I always inflate my pads and hang my down bags in between trips. I noticed that my Ins. Air Core was losing air in just two nights use. This durability factor greatly disappoints me in that I guess I have to do a repair to find the leak. I am going back to my Thermarest because durability is a big factor for me. I am also really easy with my stuff. I use a Montbell super stretch down bag, so I have to be easy. I don't know if other users have experienced similar quick leaks or not.