We were just there last week. Sailed on the Joy at full capacity. We drove in and parked right at the pier, which was expensive but worth it because it was so easy. The actual terminal is nice. Like an airport, not like a car garage like someone else said. Get there early or get there late. We arrived at 9:30 am and we were onboard about a half hour after they started boarding at 11. The check in process was efficient because they break you up into groups of what deck you are on so you aren't waiting to check in with everyone else on the ship. Once checked in, it get chaotic because most people weren't given a boarding group pass and we all had to find someone to get one. You could not board without a boarding pass sign, so be sure to get one. The actual check in took us about 20 minutes in line though, so i don't think it was that bad. Of course the higher levels, Haven and priority boarded first but that was really fast.
Aside from it not being well organized and us not knowing how it worked, it was fine. No complaints. Now we know to get there early (like we did) and get a boarding pass right away at the counter.
