Hard to say, I was presented with a polite and informative WhatsApp message confirming the time and place of my pickup in advance - a great way to communicate. The coach was on time, very friendly driver and Martha the tour guide was lovely. Great ride to Kardemena, easy transfer to the boat, picked up on Nisyros and had and excellent day there. (Explore your own restaurant as there’s great choice rather than the recommended one), volcano was great but the stench of sulphur made me feel ill 😷 and the panoramic view from the highest peak as not to be missed. Great trip back, nice boat trip back to Kos and safe drive to my apartment. It’s a pity only 3 of us out of around 40 on the just tipped the driver and only around 10 said Thanks, that’s the sad part of young people these days. Highly recommend this operator, you’ll have a great day and take away once in a lifetime experience or walking on/in an active volcano, however this operator made a great day even better. Thank you