The video posted above with the solid tires being "faster" than the phenmatic tires is very suspect. Obviously taken on very different days. Who knows what the wind is like, not to mention the 1-2 pedal strokes he gave the solid tires but not the pneumatic tires.

I'll skip the physics lesson as to why those 2 pedal strokes would matter.

Every single person/review I've seen of the airless tires comment that they are "a bit harsh." Considering most of these people bought the tires with their own money, you can take that with a grain of salt. What it probably means is that "they are actually harsh." Nobody wants to admit that something they bought is uncomfortable. I mean heck, the guy in the video I talked about above replied on the youtube comments that he bought a shock absorbing stem to compensate.

Also, nobody who owns them (besides those here on BF) comment on the performance in the wet. I'd much prefer a tire that performs well over a variety of conditions and not just warm sunny days.

In my opinion, these tires are tires for lazy people. (Apologies those who own them here.) They sacrifice speed, comfort, adjustability, and easy of installation for flat protection. Taking care of pneumatic tires is not hard. On my bikes it probably takes a minute a week. If it took you an hour to install your solid tires, that's more than a year of taking care of my pneumatic tires before I even approach the time you spent on them, not to mention the adjustability I get with that.

These tires simply don't make sense to me on a road bike. Kids bike? Sure. Bike for grandma? Sure. A perfectly functioning adult's bike that's used often? No. Too many sacrifices, not enough benefits.