I picked these up in a 15, fit is true to size. they seem durable, but I've had them for less than one week, so they have yet to prove themselves. grip is great, they're not too heavy, but they're not exceptionally light, either.
the only downsides I've noticed so far:
the side-zip doesn't make them exactly easy to pull off, but it is doable.
the trim isn't as nice as I'd like; it's a little ragged where the sole meets the upper.

Overall, they're great for the price, especially for a steel-toe.

UPDATE - 7/10/13

after owning these for about 5 months, they're starting to reveal their price. I wear these boots on my motorcycle, and the left toe has worn through the leather from shifting to reveal plastic below. The zippers, also, have gotten a little more jam-happy, but still work. I'd still say they're worth the price, as this is the only place they show wear, and I've been wearing them 5 days or more per week since I got them. I did take a low-speed spill on my bike, and the leather was only a little scuffed: the boots held up well and protected me fine.

the continuing pros:
nice weight
good fit
waterproof
warm