Our Trip Manager (Nut) was amazing. His enthusiasm and local knowledge was invaluable. He went above and beyond to make our trip fun and ensured we got the most from each of the places we visited.
With regards to the activities... The tour in Koh Samui was fantastic, we saw so many sights and had loads of fun. The local guides were great too. Snorkelling in Koh Tao was good although the sea was very choppy and other travellers should be made aware that it isn't really suitable if you suffer badly with sea sickness. Our sailing day in Koh Phangnan was cancelled due to the weather which was disappointing. Instead, Nut arranged an island tour and this enabled us to see many different areas of the island which we would have otherwise missed.
We felt like we were misled and mis-sold the trip as our STA travel agent had told us before booking that Contiki used "4 and 5 star accommodation". Although our hotels were fine and fit for purpose, they certainly weren't to this standard. This was particularly the case in Koh Phangan at the Shiralea Backpackers Resort in which our bungalow had only 1 working electric socket, no hairdryer and a bathroom window which let lizards in. Having said this, we still had an amazing time on the tour and it didn't lessen our experience, we just feel that STA should have been more transparent.