This day trip was excellent, definitely a highlight of our entire trip. Our guide (Mike Murphy) was fabulous. Very informative, professional and most importantly FUN! I would certainly recommend it to anyone visiting Dublin. But, my difficulty came in trying to confirm my booking with Viator. Nobody answered my numerous calls and I was unable to leave a message. Thankfully our hotel was close to a travel office that could help sort things out. I would have been very disappointed had I shown up the following morning at 0640 and not be on the list for that day! I was very pleased they were able to help.