I have been on RCCL before and after the curfew implementation. Let me give you an unbiased review if you feel Peter is being biased. Let this be noted that the review is 100% true, and contains nothing false or biased.
I sailed on Navigator OTS in the late summer of 2004 - before the curfew was implemented. We got a couple of extra days on free of charge because of a hurricane, and nonetheless, still one of my top ranked cruises. I was convinced RCCL was a good solid cruise line (I had been on CCL, Princess, NCL, and RCCL prior to this sailing).
In 2006, after the curfew was implemented on all RCCL ships, I sailed Adventure OTS. I understand its not Explorer - the original ship discussed, but any ship out of the RCCL fleet will suffice for informational purposes. The curfew was enforced every last waking night, including the final one. At 1am, the security guards would hold a little party right outside the teen club so that when we walked out we wouldn't "forget" the curfew. Personally, I saw this as way too far as no one was doing anything. Sometimes, we would sit on the steps right outside the club (the ones headed up to the Viking Crown Lounge) and occupy only half the staircase in case people wanted to pass. at 1:15 am we were threatened to be escorted to our staterooms. EVERY NIGHT. On the final night, I decided to stay up with a traditional all-nighter so I could see the ship dock in the morning. At 2am I went to the basketball court and was informed by a security officer that I had been generously been given an extra hour out and that I needed to head back to my stateroom. I went downstairs, and outside to the outdoor promenade on deck 4. At 3:30 am security comes walking. Needless to say even though I was outside for "fresh air", I was carded and booked (they were carrying little paper pads). It was then I decided that RCCL did not deserve my business nor my parents money.