Best was by far the All Sanctioned World Series in Columbus, OH! The fields were great, everything was organized and on time - sometimes even got started early!
You could bring in coolers, but the concessions were great! We had a blast, and will definitely be returning!
The only bad tournaments I can think of were only bad because it rained, or the kids on the team were lacking effort. So nothing to mention there!
ETA: 2nd year 10U, we play pretty local to the Cincinnati area!