I'm at about 17 round trips from Champaign-Urbana to Chicago via Amtrak (I go up on Monday night and return either Thursday night or Friday morning). I'm at about 100 round trips via Metra from Chicago to Lombard. I'm at about 100 total trips on the "L" with a folding bike (about 1/3 during rush hour).
I've saved about $500 since I started in May. If Amtrak and Metra ran at slightly more convenient times, it would be perfect. As it stands... it's merely fantastic.
--sam