Great way to see the island. I was able to do this when you could start at the top. You want to see a sunrise you are going to have to get picked up VERY early from the bike companies.
This was an awesome experience. We did the sunrise one and were not able to really see the sunrise since there were many clouds out that morning. I think you would be okay doing the one that started a little later in the morning.
Looks very interesting, it's quite overpriced for getting inside though. Many people would go expecting some awesome carvings etc and left really dissapointed.