I regularly rode the South Shore rail line to work...
I regularly rode the South Shore rail line to work for over two years. The trains were often late, and the ride to Chicago is surprisingly slow (50+ minutes from the East Chicago station). Combine that with a shoddy air conditioning system in summer months, and it's no surprise that I found a job closer to home as soon as possible.
I truly hope that the NICTD is serious about improving the rider experience through train upgrades and a southward expansion of the rail line itself. This is the only way I would consider becoming a regular rider in the future.