We took this trip while visiting Iceland for the day with Princess Cruises.  The tour was the highlight of a European trip that was overall fantastic.  Your tour was twice the value and adventure compared to the one the Princess cruise offered through the ship.  We especially liked getting away from other "tourists".  Some of our party were 70-80 years old and found the physical demands of the trip just fine - but prefered to stay out of the lava cave.  Our guide was terrific.

Spencer, San Luis Obispo, California.