I went to see it last week and loved it. Telling the story of six different lives that intersect in various ways via the hub that is 'The Keeper', I found this a deeply affecting piece. Perhaps because the writing, and the way the story has been structured, thrilled me. Or because the setting was so intimate you could feel the characters palpably. Or because I related in some way to each of them.
I thought it a beautiful exploration of our insecurities and confusions under the metaphorical arch of lost and found. Telling parts of the tale through song (a writing device I'm keenly interested in right now) only added to the emotional reach. And the final vista of Manchester's actual physical lines (streets, roads, train, trams, buildings...) placed the whole thing into the powerful and thought-provoking context of the people and lives we see around us everyday: all doing exactly what we are doing, looking for ourselves.
I don't want to spoil anything by saying more, but if you get the chance to go and see this, then please take it.