First, i suggest you go in blind, or immediately after the trailer, and watch at least until they get to the house. I almost turned it off before that and I'm so glad I didn't.
This is a film that I thought would be a typical British sci-fi comedy, if there is such a thing. I thought it would lean more towards humor like "Frequently Asked Questions About Time Travel", but this is a pretty serious movie with some well thought out implications. I actually like this better than "Frequently asked Questions...", although it does have some similarities. Without spoiling anything I will tell you that this too occurs in one primary location, and this too has multiple versions, or multiple timelines piling on top of each other.
If you are looking for a good watch that is sci-fi-ish, time travel, then you've got it. I couldn't find a version with captions, and I would have appreciated that in certain parts that are a bit hard to make out, but other than that this was a good flick.