The upper heel cup of these shoes is split in a "V" shape (on purpose), and when you wear them the outer rubber heel cup layer is able to poke through the "V" and it cuts into your achilles when the shoe is short enough for climbing. I had to snip 3 of the stitches spanning this "V" because the thread was sawing through me like my heel was made of soft cheese.  I took these back to the store and traded them for a pair that has a normal binding above the heel cup.  Now, onto the good:

This lace up climbing shoe has a good combination of leather and synthetic in the upper. The leather across the toe box, tongue, and lining mean it will absorb sweat better and dry out faster than a fully synthetic shoe (and stink less because of it), and the perforated rubber in the heel and sides also helps with perspiration.  The synthetic across the lacing area keeps them from stretching too much in width over time. These are supposed to stretch about a half size in length over time (not sure how long that takes), so don't get ones that are too roomy.

The toe box has enough room vertically that your nails won't be pinched down at the end: for me this is a necessity or I lose the nail.  But it's not so roomy that your toes will slide around while climbing.

I normally wear a 7.5M street shoe and the 7.5 fit with the right amount of toe-curl. I was instructed to try a size smaller because of potential stretch, but the 6.5 and 7.0 were far too short (toe crunch, unable to stand).  They'll fit wide feet and narrow very easily.

If your heels are well calloused, you might not have issues with the split-leather shape of the heel cup top, but I couldn't even get to the pitch in these without blood.