When I watched the trailer, I felt I've heard this storyline before, even whilst watching the movie it felt like it was a remake of another. It wasn't until afterwards when I was reading another review did I remember that the name of the movie that this is similar to is the psychological thriller 'Before I Go To Sleep' starring Nicole Kidman and Colin Firth, which was also based on the book with the same name.
In Secret Obssession, the trailer does give away that Jennifer's husband isn't who he seems to be, which may have been the intention as it seems to add to the viewer's experience of Jennifer's journey of discovery. It is gripping where you just want her to find out, wonder how she is going to handle this and what will happen next. However, there are holes in the plot where certain scenes just didn't flow and you wonder what was the point of scene, how did that come about and how do certain people meet or know/find each other to create that scene. Backstories of a few characters needed to be explained a bit better, especially towards the end.
Easy to watch, but predictable.