My dad and I really enjoyed our two day tour with Victor and the eco tour team.  We stayed at a lovely hotel, which was a nice bit of luxury for us, and even though it was a little way out of town, the staff were more than happy to drive us in any time that suited us, and it was cheap cab ride back.  The tour itself was well managed, with a good combination of activities and sight seeing opportunities.  Jeju is a lovely place and the Eco Tour truly shows you the best bits in an easy, comfortable and convenient way.  I would definitely recommend this tour.