Look him up in Wikipedia.
Look him up in Numbers USA. In two of the key immigration issues he participated in, he ranked A+. Secure the border. Internal immigration enforcement.
Mike Huckabee said on Fox news Ryan is a very good choice with definite advantages. A true conservative with good values in other areas besides immigration.
Here's Ryan taking apart Obama in 6 minutes.
http://www.teaparty.org/article.php?id=4036