X is well written, daring and moving. It tackles big themes; futility, loneliness and emptiness. So, it is not exactly light entertainment although it does have some funny moments.
The acting was great, it needed to be, given the elliptical script. The direction was also really good, making the times when we could not see the stage almost as dramatic as when the lights were on.
I found the ending emotional and the play stayed with me long after I left the theatre.
Love it or hate it, I guarantee that you will not see another play anything like X this year!