Quick question:

I've been building sites and database systems using PHP for years and love it. I am now hiring a 3rd party to build out a web site (which will work with an app later) and they want to use CodeIgniter.

What's the thoughts on this? Are there limitation to CodeIgniter? What issues can expect to see? I don't want to turn out being like MySpace stuck with ColdFusion after the traffic gets popping.

All feedback appreciated.