The attention is never a bad thing. I have never had any bad reactions from people. They often come over when Ive stopped for coffee or ice cream and ask about the Kickbike. Ive talked to people all over Europe and I dont mind them having a go to see what its like.
Hills. I have road bikes and touring bikes and hills are not easy whatever you are on. The fitness you gain on a Kickbike is more like running fitness, rather than cycling fitness. There is a difference, even if its in your head, but there is a difference. Dont forget the guys last year did the entire TDF course. So hills can be overcome. Some of the best Kickers are from Czechoslovakia and they have a lot of hills.
Daily mileage. With my touring bags on and about 10kg of gear I am travelling at about 15kph. Without the gear I travel at an average of about 23kph. I am not fast by any means.
Apart from the few kph extra you get on a conventional touring bike there are no other advantages over a Kickbike. I dont have any real maintenance to speak of, no uncomfortable saddle or gears to mess about with. The ability to stop and get off is so much easier with a Kickbike, as Strange as that sounds.
For long distance touring I have a Koga World Traveller, which is an excellent bike. But once you are into Kickbikes you are hooked.
Steve