If it's good to do a code review, do it more frequently. This is one of the things that happens when you do pair programming. The code is continuously being reviewed by the pair. However, when you a have a very small team you probably won't have much "promiscuous pairing" going on. Then you can do a daily team code review. It won't take much time because you're only going over today's work not a whole release. Be sure to leave enough time to refactor too!