I have been looking at several different tarps and I can't pull the trigger on the cuben fiber tarps. For the cost, the sil tarps look just as good. I realize there is some weight savings. I also have heard that the cuban can tear easier. Also some report a "green house" effect from the cuban. I frankly can't see how this can be much better/worse than the sil. Fortunately, I can afford to buy cuban but am not in the habit of being wasteful. So, for those who have both or at least have tried Cuban, is it all that?