I often shoot wide open in strong light with this baby. I dont need to but it just magics up an aura around brightly lit objects that's worth gold. I'd say it's worth it's weight in gold... but it's so light it's not saying much - one of the advantages of cheap plastic construction!
I do street photography. Consequently I dont give a gnat's arse about lppm. Once I've put down my photo mags, I get out and shoot what happens.
Beautiful colours, pearlescent bokeh, gorgeous slice-thin depth of field when wanted, light as a feather. Reasonably cheap too so you dont treat it like a museum piece as you do with an L lens. This is a lens you can use & forget about - you come back home, pop yr pics on the 'puter & drop your chin on something soft.
Closest I've come to falling in love with a piece of hardware. After I got this I sold my L's (& my 1.8, it's geeky cousin...!) & started enjoying DOING photography, not thinking about it.
It's a fine-looking little thing as well - not the detailing but in terms of proportion. Not that it matters... but it does! Why do we buy nice clothes after all?
This is it for me, 20d + 50 f1.4. At least until Leica get their finger out their ass & produce a decent piece of digital rangefinder gear. I'm not holding my breath!