I forgot about Stephenson...although I personally wouldn't buy from them. Note, however, these quotes from the reviews you pointed to:

From the guy who's had his 35 years:

"35 years is a good run. I'm looking to replace it with a 4 season type tent. My thanks to the Stephenson company for such a quality product."

Next reviewer:

"I have used it in the Canadian Rockies as well as on Aconcagua at lower camps as a backup. I am not sure how it would take the higher winds up high. Packs up real tight."

And, in fairness, the next:

"I've spent nights in howling winds and snow and felt very secure (while other member's tents collapsed)."