As far as other drivers are concerned, the only problem is that over the years they started looking more and more like 'regular' cars, so 'regular' drivers coming behind are surprised because they wrongly estimate their speed (well in fact they don't estimate anything, they have the mental model that cars always drive around 80 km/h, and bicycle around 15 km/h, so they are surprised both ways when a car or bicycle goes around 40 km/h).
But drivers must be reminded that normal roads are not a space reserved for cars, motorbikes and lorries cruising all the time near the speed limit, but can be rightfully used by any kind of vehicles (tractors with or without trailers, bicycles, horse-drawn carriages and so on), and that they can be encountered moving at any speed in ]0, speed limit] for a good reason.
I want to say the same issue applies to cyclists, but then the compliance rate of cyclists is not high. The only consolation is that cyclists loo sufficiently different from cars that drivers give them a wide berth.
In my experience they drive as well/bad as other drivers, just slower. Even in 50 km/h areas you'll see them drive at 20/30. Generally not a problem in cities. On bigger roads I've seen some move a bit to the side so you can overtake them more easily.
You actually need an AM license, which is a 1 day training.
