I bought the Essential Bundle with Thalassa as the main mat and Melete as the touring version. I adore both and, to be frank, bought both because I couldn't make up my mind as to which I liked most!
As you point out, they are a little slippery at first, and I have followed your guidance and sprayed a little water on them to create grip.
I love the fact that they are a little wider and longer than other mats. They are both supportive. Excellent quality that I know will last. I have been doing yoga for over twenty years and these are the best mats I've ever had.
They are beautiful works of art and I have received many compliments for them. I am proud to carry them to classes. The bright, Mediterranean Thalassa colours are a boost to the spirit as we go in to the dark winter nights.
Thank you, Alan