I wanted one, when I saw it, but I didn't need one - damn!
The Cuben version will have less give in it and will be a bit more "fussy" about where and how it's pitched - (paraphrasing Ron). But, the weight is fantastic.
And, the Trailstar has proved itself (Scottish) stormproof!
If I was buying one for the first time I'd give the Cuben a shot, but it's just too much for me to have two versions.
Mike, could you give some feedback on the Cuben version - please?
The issue for me would be just how easy it would be to pitch on rough ground with a bit of a hoolie going on? The beauty with the silnylon version is you can pitch it out of line - so to speak - and yet still get a taut pitch.
If anyone is looking for a single skin shelter with plenty of room to play in then I can fully recommend the Trailstar - it is a proper lightweight shelter that will take stormy weather!