This is a very short story, so it will be a short review.
Paycheck is clear, clean writing. It actually fits in quite comfortably with The Minority Report by PKD as both deal with the ability to see events that have not occurred yet. I suppose the technology in Paycheck exceeds that in Minority as they are also capable of "reaching" into the future, not just observing it from the past.
The book was a little dry. Anachronisms littered the story like punchcards in a modern data center (terrible). It also suffers from the Deus Ex Machina problem of having a guy who knows the future providing you tools to deal with the present. Whatever. It is good, very short, and a fun read. Nothing profound, but fun.