I have used the STS insulated light (Orange, mummy shape) for my hikes, however recently purchased the STS insulated comfort plus Large (Red, mummy shape). While it takes up a bit more room in the pack and weighs a bit more than the STS light (weighing in at 1kg for the Large), it adds amazing comfort and insulation, and is far superior particularly if you are a side sleeper. At no time does any part of my body feel the ground, whereas the light version I found requires a bit of wriggling to keep hips cushioned satisfactorally. Highly recommend it. I use this with my EE revelation quilt and STS inflatable pillow, giving me plenty of room to toss and turn (as I tend to do) I also purchased STS fitted sheet for my STS mats which adds extra comfort for next to no weight.
Side note: My young kids have small STS light mats with STS fitted sheets that slot into their sleeping bags, which they use camping and on sleep overs. They love them.