We did the same last week with EasyJet and can’t compliment them enough. At Gatwick a lady came over and took us to the front of the huge queue. Then we took the bikes ( under 32Kg in a bag ) to the over sized luggage man ( right hand side of desks ) and that was it. Bikes arrived with bags totally unmarked via the oversized baggage counter that is situated half way down on the right of the baggage hall in Geneva. On return the bikes came out of a set of doors to the side of our reclaim belt, again with no damage. Just make sure that the bike bag only has the bike and spares in, and not clothing. We took another hold bag each of 18Kg giving us a total of 50Kg each plus hand luggage.
Easy!!! Enjoy, the riding is awesome!!