In reply to broken spectre:
It depends on what you want if for. If you want as light as it gets and money is no object, then this: https://www.ukclimbing.com/gear/camping/sleeping_bags/therm-a-rest_hyperion... is still going fine after 4 years.
It's now over 8 years that I've had this Sea to Summit one https://www.ukclimbing.com/gear/camping/sleeping_mats/sea_to_summit_ultrali... - I've just used it for another week in Italy. It's a bit heavier and bulkier than the Uberlite but wider, harder to roll off, and insulated enough to be fine on snow in moderate temperatures.
Other than that I have a 32 year old Thermarest 3/4 length ultralite mat. It's kept working fine for over 32 years with just the occasional puncture fix. What more can you ask for? We had another one that got to about 20 years old when it started to delaminate and bubble. I asked Thermarest if there was a fix, they said unfortunately not but send it to them to see and by return of post they sent my a brand new nearest equivalent - one of the Prolite models. Can't say fairer than that.
If money is an issue, or you don't trust this new-fangled self inflating technology, I have a 25 year old Ridge-Rest. It has an inch long rip in it, but its a Ridge Rest! It doesn't make any difference at all! In the family we also have a newer slightly more fancy Z-Rest. That has no rips in it, but has only had about 15 years of regular use.