Wonderful. A lot of effort climbing the stairs but well rewarded with the view from the top. Our guide (I'm sorry I forgot her name) was excellant. She provided a comprehensive description of the Doumo, its construction, the meaning of the frescoes under the dome, as well as construction of both the inner and outer dome. And she maintained a pace up the stairs that insured even the oldest of us made it and we were always safe.
We have used Viator tours several times and the have always delivered a safe ona wonderful experience