Build: Smaller than I expected, but they're weighty and seem really solid. High-pass and pad switches are recessed, you need a screwdrivers or something to switch them - kinda annoying, but it makes sense. They're not going to get knocked accidentally.
Sound: I've tried them on acoustic guitar and as drum overheads - they're natural and clean sounding. Feels like there's a small bump in the highs, but it's just enough to add a little sparkle, there's no harshness or ice-pickiness.
Overall, they're really nice mics. Getting a matched set at this price is great, though I wish they came with a case (I'd happily pay a little extra). Great upgrade if you've got some cheapo overheads.