well its the ultralite version ( 6 A) its double as expensvie and 50 grams or so ligther. I dont think that there is a lack of reliability as they are all tested before they pack them up in the box . Durability should be also the same as they use a little better rubber for the tubes. I think they use the same quality tube rubber as for their tubeless tires ...

Of course its a bicycle tube , meaning there are 100 ways to mess it up and have a flat after 3 hours or 3 weeks. Not counting the things on the road which you might have missed the last 3 years and now with the expensive tubes are magically drawn into ...
I dont sell them at this time as they are too expensive for my taste. But I always open to suggestions

Thor