-super-comfortable on and off the bike
-ventilation is good but more for letting heat out than flowing a lot of air in. The fact that you don't feel a lot of airflow means they're usable in cooler weather also.
-no "hard parts" on the bike-side surface of the boot means less scuffing, wear to your bike's frame, swingarm, etc.
-smart toe-slider design
-really easy to get into/out of
- Velcro-closure flap tends to snag on footpegs and kick-stand when getting off bike. Not a big deal but kind of annoying