The concept is very good even if there are some (serious) holes to be filled (like how did he pay for the service in the first place, how changing the past affect everything in the future, and so on). Apart from that, during its 6 part span, the story develops nicely, slowly but surly. The finale is well worth the wait and gives you a glimpse of what may come next.

The protagonist, Patric J. Adams, who made himself a household name with Suits, takes on a completely different character here, a much less amiable figure with a lot of dark shadows in him. That makes his Philip a more believable human being yet, obviously, less likeable. All the other actors are also fine in their roles with the female lead, Karine Vanasse, is outstanding. (Her character's brother, played by François Arnaud, and Philip's borther, acted by Joshua Close, are on spot here as well.)

The production value is up to date, the camerawork is strong and steady (no shaky home video-like BS here), the score and editing are all humble to the story.

All in all, this is a fairly good mini-series, well worth the watch.