+1. I've lived in the city for 5 years and found all places but the last on CL (last was CL through padmapper). If you manage to get a good workflow you can find little gems in less than a week.

That's the beauty of its UI, the fact that's it's not so appealing puts some people off but also rewards those working hard at it. The amount and variety of offered appartements on CL is huge and much better than what most other sites would offer. That makes for an experience whose reward can be very high and this is valuable when looking for a place to live.