We used it this past week, too, and found it to be adequate. It was spotty during the day, as WDWguru mentioned. I hadn't thought about the convention thing, but that makes sense. It was the first time we'd traveled with the laptop, and it made some things easier. There were times that I wished we'd left the thing at home, though (like when I wanted DH to come to the pool instead of staying hooked up to the office, but I guess that really only happened once, to be fair!).
Julie