See it if you like sweet and sappy. It's totally a Hallmark movie. But there's a place for that and this is nicely done. Be in the mood for light.
Don't see it if You don't like cliche and Hallmark-y.
See it if you enjoy imaginative well performed theater. A mystery, a ghost story, a double romance, a lovely play excellently produced.
Don't see it if I cannot think of any reason not to see it.
"One of 'Sonder's' triumphs is that it delivers sentiment without getting stuck in sentimentality...All the characters, in fact, are endearing, thanks largely to the actors who inhabit them...The actors give these characters life, but the script gives them something more. Moldovan's play transcends realism by populating the same space with characters from different times...For all its merits, 'Sonder' isn't perfect, but its digressions into implausibility are outshined by what it gets right."