Very good quality parts and beautiful minimalist design. No chain and derailleur that keeps on wearing out as is with other e-bikes. Very nice saddle and handlebars, with a nice sporty sitting position. I enjoy the aggressive electric assist - my compliments for this. The bike has also been easily serviced by my local bike maker (high quality and readily available parts have been used, eg. Gates belt and a Tektro brake system).
Two minor points to note: The brakes kept squeaking, probably because the brake discs became greasy during production. I had to replace the brake pads myself. It would also be nice if the engine would have had a little more torque on some very steep Limburg hills (The announced Cowboy 4 does have this, but the C3 unfortunately does not).
Furthermore, I am a very satisfied and proud Cowboy 3 daily user.