I’ve only had the front wheels installed so far and haven’t done any aggressive riding. Only commuting to the office.
They feel very much like pneumatics. The advantage is that you don’t risk a flat and they will probably last longer as well. The extra width makes for a very smooth riding over blind people marks and similar kinds of uneven pavement.
The downside is they are heavier. They also collect dirt a lot and splash a lot. I definitely wouldn’t recommend taking them to wet/muddy weather. Little rocks like to get into the rubber since it’s very soft. That’s a bit annoying.
Obviously the wheels are primarily designed for racing. That’s where I’m sure they will really shine. For casual riding, they seem to be a decent alternative to pneumies with both some pros and some cons.