I'll preface this review by saying that I'm incredibly cheap. I go for no-name brand cheapo stuff, or buy at a discount (I love steepandcheap) for everything. In fact, these boots are literally the only piece of outdoor gear or clothing that I have that I paid full price for. I returned my hiking boots and sold my Xbox to finance them. And they're totally worth it.
Right out of the box, the first thing I noticed was how incredibly light they are. They also fit my low-profile feet very well (with most boots I can tighten them so that the lace loops are almost touching, these lace up light they're supposed to) but still have a roomy toe box.
I ordered them for a late-season attempt on the Pickets, but it was cancelled due to weather, so instead I figured I'd break them in hiking up to the Coleman glacier with my girlfriend. I expected to get blisters given how stiff the sole is, but I finished the 6 mile trek (mostly hiking with some scrambling) with perfectly comfortable feet. I even wore them for some slightly sketchy stream crossings, and with my gaiters on my feet stayed dry (a concern given how the Trango S Evo tends to get soaked through).
No local shops carried them, so for sizing I tried on a Trango S Evo with a pair of medium-weight hiking socks. I wear a size 10 street shoe. The fit feels identical to the Trango S Evo.
Also, note that the lace loop right below the nylon loop shown in the pictures is locking, with helps with holding your foot in place.
Pros: Lightweight, stiff, comfortable, no break-in period required, waterproof
Cons: Expensive, color pattern not for everyone (but I love it!)
The plastic lace loops seem pretty solid, but it remains to be seen how they hold up banging against rocks.
In conclusion, I would definitely recommend these as a lightweight boot for summer mountaineering or highly aerobic mountain activities where lack of insulation isn't a concern.