Overall, a good bike ride and tour. Our tour guide was a recent geologist graduate and very knowledgable about the area and the volcanos. I would rate it a 4-5, but unfortunately a few of us experienced a terrible bike crash about half way through. It began to rain during our tour and the guide and van driver did not warn any of us about how slick the road would get. And to make matters worse, the tour guide led the way on the bikes and went way too fast. We hit a turn and 1 bike skidded out and crashed, which caused another biker to swerve into traffic and take a very hard crash on the road four other bikers skidded hard also, and narrowly prevented themselves from taking hard road crashes. This accident obviously ruined 2 of the bikers trip, as they both were bleeding and had large cuts on their legs and arms, and this put a sour mood on the entire tour for the remaining time. I realize accidents can happen, but these experienced tour guides could have easily prevented this by just setting the lead pace at a very slow pace and warning all about the keeping their speeds down on the wet roads. To make matters worse, if you read the review from 2015, another person mentioned this same issue and said his wife broke 2 ribs when she crashed. Therefore, the owner and guides should know about this issue and take measures to prevent it when it is raining.