So far I'm very happy with my Exped Synmat 7 Ultralight in medium and Exped Pump Pillow to inflate it.
Online reviews I've read seem to suggest a high failure rate but, fingers crossed, no issues so far.
I've completed a 3 and a half week tour of the southern coast of Western Australia and not woken up on the ground yet.

SynMat UL 7 M | USA