We went not particularly to see the church, but rather to have lunch and take in the panoramic view at the top of the hill. Indeed it was beautiful like all greek orthodox churches. It is rather small but its probably not meant to serve a large congregation. A otherwise serene place for reflection (except during the Summer months)
Super view of all athens from all sides
The walk is worth the result.
U can go up on foot from the bottom of the hill or by car and there is a huge parking next to the theater. Still a short steep walk up but worth it.