YES! <img src="/images/graemlins/smile.gif" alt="" />

First, it's definitely small enough for EDC. It's much, much brighter than, say, an Arc AAA or Photon. In my opinion, the killer feature is the variable brightness. It allows you to trade brightness for runtime. Not all tasks require the brightest setting. By just using the amount of light you need, your batteries last longer.

For example, the lowest setting on the 60 will just let you see your wrist watch in a dark room without disturbing those around you (movie theater), the brightest setting easily lights up the shadowed areas on the house across the street. The lowest setting would last for 100's of hours, the brightest setting only lasts 20 minutes. HDS Systems Runtime Chart

I bought the Ultimate 60 just because. Really, the Basic 42 would be fine. The biggest difference is that you can't change the factory presets, but this shouldn't be a problem. I've changed the brightness of my "primary" and "secondary" settings a few times, just playing around. Didn't really need to, though.

If you have any specific questions, let me know.