I ran ~50 miles in these over the summer, mostly for 5k races. They're very lightweight and minimal, and offer a fair amount of ground feel. No insole, no arch support, no cusioning. You can roll the shoe into a ball easily. These are the Puma successor to the H-Street and K-Street, both of which were praised for their minimal characteristics when they were available.
Downsides: -Very little traction, so I would only use these for roads and very, very well manicured trails. -Narrow, and may run a 1/2 size small depending on your feet. -Wore out rather quickly on rough sidewalks.
Upsides: -Relatively inexpensive, especially if there's a sale. -Minimal, and the flexibility encourages a forefoot strike. -Breathable upper. -Heel to toe drop is very, very, low. Didn't have calipers, but AT MOST it's 4mm, and I wouldn't be surprised if it's zero drop entirely. -Shoes ride very low to the ground. -Stylish enough to wear as an everyday minimal shoe as well.
Zappos links: Men's: http://www.zappos.com/puma-street-kosmos-snorkel-blue-new-navy-white Women's: http://www.zappos.com/puma-street-kosmos-nm-wns-white-puma-silver-aquarius
Since you are a contributor, you could add this model to the database, then write your review there instead of in the forum... just a suggestion ;-)