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I'm impressed with this little mat - especially for the price.
First, the "positive" aspects. This mat is very small. When I roll it it's dimensions are approx. 27cm (length) by 48cm (circumference), 15cm diameter. It easily fits into the (supplied) stuff sack. It's also light, approx. 775g. When unrolled, it's a good length - I'm 6' and I can lie on it fully stretched with no difficulty. Finally, it appears to be made of robust material (which doesn't have that horrible plastic smell that some products of this type do) and it comes with a small repair kit in the stuff sack.
Second, the "OK" aspects. This mat provides good ground insulation. It's not the very best insulation, but it's certainly good enough for northern Europe in late spring through to early autumn. For winter, I'm thinking that something a little thicker would be useful. I think that it could be used in winter if coupled with a good sleeping bag, but I think that I'd like something just a little thicker. This mat is self-inflatating, but it does require some human assistance. Maybe mine is a little different to other people's, but I would estimate 5-10 lungfuls gets it up to a good level of inflation. Once it's fully inflated, it's pretty comfortable. I found it to be perfectly acceptable for a few nights of camping.
Finally, the "negative" aspects. There are none. At least, none that I have discovered.
For the price I think that this is a really good option. There are thicker and warmer mats out there, but they're also heavier and more bulky. For me, this mat is exactly right. A great size for backbacking/motorcycle camping, robust and warm/comfortable enough. I'd have no hesitation in recommending it.