Which Exped mat(s) failed on you, OP? What exactly was the fail? To your knowledge, is the failure common to all types of Exped mat, or just the type you have? Can other Exped owners/users comment regarding their experience?
Shame if there's an inherent flaw/fault/weakness. Even with a great warranty, a mat failing while on a trip is a big PITA.
Of all the mats I've owned, the most reliable has been my Therm-A-rest Lite 3/4 self-inflating jobbie. Never leaked a bit of air. Packs to maybe 8" x 4". But it couldn't be regarded (by me) as comfy, particularly in the silly 3/4 version I bought. I was on a lightweight buzz at the time. In fact no self-inflating mat I've used was comfy for me.
So to replace my Therm-A-rest (20-odd years old now), I've been looking at alternatives - gotta be COMFY, light, and pack small. Exped SynMats look ideal, if expensive. Sick of cheap store-brand self-inflating mats leaking, usually at/near the inflation valve.
Interested to hear of COMFY alternatives.