NYCC imo is 'okay', nothing spectacular. I havent been to SDCC yet and I know this pales in comparison. Tickets were $50 for the weekend pass.
As far as how crowded it was, Friday was pretty good to walk around. All the aisles had enough room to walk although not many cosplayers were present. Saturday was probably twice as crowded as Friday was and the cosplayers came out to play. Still though, even with the crowd, you could still get to where you wanted to go without any real problems. only when people stop and bunch up around the booths is when you get traffic jams.
As far as panels, i didnt see anything that interested me so I avoided that completely. I guess im not as hardcore as some to spend time in line waiting to watch panels.
For me, I didnt expect much from NYCC, but I went to see some new upcoming stuff in person and just see what it was about. I think if they get some of the bigger companies and names in the industry to NYCC, it will definitely be more worthwhile to those out of state.