Has anyone used rumbo.es to book train tickets? I've explored their fares online and they are comparable (if not a bit cheaper than!) to the fares on the Renfe site. But, it is much easier to book online using rumbo.es

Just wondering what anyone's experience with this site/service have been.

This has been mentioned on the rick steves site (transportaion) with good comments. Have not used it myself, however.