I wanted to like this one more than I did.
Time travel stories are popular, and as is often the case when writers go to the same well to many times, they tend to become repetitive. I respect this episode for a reasonably original take on the genre.
Unfortunately, the execution doesn't work. The central drama doesn't work because Picard's reaction to the other Picard doesn't ring true. It's not helped by Troi's explanation to Pulaski that it's because the "other Picard" represents failure. Also, the resolution of the crisis doesn't make much sense. There's a seed of an interesting story here, but the episode oveall doesn't leave much of an impression.