Yes, 1-Q is by FAR the biggest selling pipe tobacco in the US. It is sold by pipe stores across the country, under about a zillion different names (normally, a local shop buys it in bulk and then renames it).
So, why is it such a big seller? Because it's a damn good aromatic. If you don't like aros, then clearly stay away from it. You won't like it. But guys who like aros seem to gravitate toward it like white on rice. I'm only a part-time aro smoker (I much prefer latakia and heavy perique blends like Old Joe Krantz), but I've smoked my share of it and can understand the appeal.
That said, it will ghost a pipe pretty bad. Not as bad as Ennerdale, but you still might have an uphill fight getting it clear of the distinctive sour/vanilla taste. Unless, of course, you follow Branzig's advice (which I will second). Smoke a lat bomb in it a few times. Old Ironsides, Pirate Kake, Odyssey, or Ten Russians will freaking kill it dead. If you're a smoker of pure VAS…. well, I don't know what to tell you.