I went for all 4 days also - just like the last two years. AQS puts on a very professional show, and I think it keeps getting better. Some of the extra vendors from last year didn't have much to do with quilting, so I wasn't sorry to see some weeded out this year. (I never saw the Martelli booth very crowded last year -that reasoning surprises me actually.) The classes I took were excellent, and I wouldn't have thought to buy a reverse applique book if the author hadn't been demonstrating how easy it is. I found pieces of a just-out fabric line I've been drooling over, and even got a 25% coupon to visit a nearby quilt shop that had the whole line! I bought a spool or two of threads from most of the major thread lines so I could try them out in my machine (better than ordering online & paying shipping), got to pick up some long arm rulers I can't get here (again, after watching the demo on how to use them - priceless) and pretty much absorbed inspiration for 4 solid days.
You bet I'll be back next year!