Anyway, here's why I'm confused. One, the Annapurna isn't a single-wall tent. It has a traditional double-wall, fly/canopy design, using silicon-coated nylon ripstop for the fly and plain ol' nylon ripstop for the body. There's plenty to debate if we're talking single-wall tentsI think they're fine, but only in certain casesbut not if it's the Annapurna.
Two, I'm not sure if the guy at the shop was calling it "junk" because he mistakenly thought it a single-wall tent and doesn't like such designs, or if he was just having a bad day. In any event, I think the tent is too new to the market to qualify it as one thing or another. But certainly, the Trango is a proven design, and I can say without reservation that Mountain Hardwear tents, while often a bit weighty, are without fail extremely well made. The design changes in the Annapurna were at the behest of Ed Viesturs, high-altitude mountaineer par excellence and Mountain Hardwear's gear-design consultant. I don't think Ed would settle for a tent that's "junk."
But, you didn't buy a bad tent. Maybe a bit more tent than you needthough not if you're serious about jumping from day-tripping to expeditionsbut a fine tent nonetheless.