+1 again, although the synmat is perfectly adequate (we have a pair his and his, but she gets the downmat which I use in winter as her summer mat, she doesn’t camp in winter).
+1
Synmat is slightly better all round option (in the UK anyway) IMO.
We’ve got both and while they are the same weight and pack to roughly the same size, the Synmat is only 1 R-Value behind the downmat, but is considerably cheaper.
I camp all through winter in Scotland and have yet to hit the limit of the Synmat (temp rating of -17), never mind the downmat.
In addition, I find the downmat a bit too warm in summer.
Finally, we blow into the mats on occasions rather than faff about with the pumping mechanisms and I often regret doing that with natural fibres in the downmat.