Al beat me too it again, I was just going to suggest you read that thread. I really like my L1. Do you have any specific questions on the L1? The other thread contains a huge amount of info.
I really like my L1 too. It's the only single SF123A model I ever carry. I've got an L1-HA-WH white light.
I want to get an L1-BK-RD red light version...
I totally agree! Great little light and a hard choice for EDC between it and the Arc LS. The LS wins for work days, but the L1 is my Sunday Go To Meeting light!!!! All my non flashaholic friends drool over it!