Fantastic experience but slightly costly considering. We arrived at the lagoon while still dark, and this made the trip even more enjoyable. Coach transfers were OK, but more information could have been given regarding the changing over from one bus to another during the day. Take flip flops to the lagoon as the decking is freezing. Gulfoss and Geysir are very close together, so no worries about long travel times, but take some refreshments as it is a long day and no food is provided. There are canteen and cafe stops along the way, but they are expensive. Best advice is if staying in a hotel that provides breakfast, make up some sandwiches before the coach picks you up. All in all, a great day with some fantastic scenery.