These wheels are very fast and feel fantastic to ride. They've been raced, but never crashed. Can be used with either 11 speed or 10 speed cassette.
I have used carbon brake pads I can include. The drawback of these wheels: like all carbon wheels of this era - their braking performance suffers a LOT when they're wet - I would NOT recommend riding these in the rain.
Everything else about them is fantastic if you're looking for a cheaper set of aero racing wheels for dry days that feel and sound great.
Feel free to make an offer, thanks.