The overall experience was 5 stars because all of CIE is lovely. Two recommendations for future guests: Although instructions indicate that CIE will meet Dublin arrivals after baggage and customs "in Terminal 2", our flight arrived at Dublin's Terminal One. There were NO signs telling us we were in the wrong terminal, and plenty of other tour guides were waiting for guests, so we waited a full hour before digging out the paperwork, noticing Terminal 2, then eventually (after completely exiting our terminal) discovering we were in Terminal One. The hike to Terminal 2 with luggage took over 10 minutes hard walk, which might be cumbersome for older travelers. Please consider having someone from CIE accompany or direct guests who arrive at the other terminal.
Second, for our particular package, we had two days of free time to utilize Dublin's "Hop on, Hop off" bus. The problem? We'd never ridden a bus in Dublin, knew nothing about the transport system, and our hotel was very far from the Hop-on experience. We attempted repeatedly to board what we thought was the right bus, only to be ushered off because our vouchers were no good for regular bus fare. We also didn't have exact change to pay our own way. Getting where we needed to go required downloading a taxi app so we could charge to our credit card just to get to the location where the Hop-on bus ran. I strongly recommend that instead of vouchers for the Hop-on, please consider two day unlimited bus passes for visitors to explore Dublin as they wish.