Hi, I use Redis as a session handler for a large project I am currently working on. I think it is very powerful and is better than memcached due to Redis 3.0 being released; more features than memcached, and more powerful I believe.
Read this post which will elaborate on what I have said http://blog.cloudmagic.com/2014/02/18/session-handling-for-1-million-requests-per-hour/
Also, it is very easy to get Redis session handler up and running, just set up the config in config/session.php and then change the session driver in your .env file. I have not fully explored it yet so I have not passed an intermediate stage of using it, however, it currently works like a charm!