As mentioned in the EDC flashlight section I recently ordered a Streamlight Microstream from Amazon
I received it today and thought I'd do a quick write up on my initial impression, along with some better pics than you find online.
First, it's quite small.. You can see it relative to several common "pocket" items in the pictures. The important part is that its long enough (for me) to hold with my thumb on the (tail mounted) switch and the lens is pretty much at my pinky. Any smaller and I wouldn't be able to grip like this. If you have big, meaty hands, look for a bigger light.
The upside of this is it fits easily in a pocket, less obtrusive than either of my normal pocket-knives, and barely larger than my car key.
Streamlight lists it as 35 lumens, not impressive but likely adequate for most uses. Obviously this is a tradeoff for the small size... for me this is back to the ".22 in your hand is better than a Desert Eagle in the safe" argument. Sure I'd rather have my 6P Surefire, but it's larger than I want to carry all the time. Often I'd rather have my 6D Maglite, but again, something the length of my arm isn't exactly carry ready.
Streamlight did a really cool feature with this light, the pocket clip doubles back for use to clip onto a hat brim. It looks dorky, but seems functional and secure, and I'm betting it will come in handy someday.
If you want to turn it constant on rather than momentary it takes a very deliberate push. If you usually want this as a momentary this is good.. if you mostly want permanent on this could potentially get annoying. I like Surefire's method better of push for momentary and twist for permanent, but not a big deal for something this size and cost.
Everything else is pretty much what you'd expect from a company with Streamlight's reputation. Only thing I was surprised at (in a good way) was that it has a serial #.
On to the pictures