I found the side-button olights too difficult to turn on in the dark without fiddling and they will turn on if you carry them in the bottom of your pocket. For me the thing keeping the Stiletto from being a great EDC light is a more usable medium power. Low is too low and medium is too bright. The light runs down too quickly using 250lms for utility tasks.
After I got over my 'I'll get kilt in the streetz if I have less than 500lms' the streamlight usb has been great. If I want more of a spotlight I will augment with a 1l-1aa or 2L-x.