Comfort depends on the shape/size of the rider.
A rider who's 5"3 is gonna have different opinion of a comfortable bike than a rider thats 6"2...
Also 19,000km is hardly an indication of reliability.
Had a 2004 gsx-r 600 that i sold at 45K to a friend, he rode it to 80K, sold it to another guy and now the bike is over 100k. With that said over its lifetime it needed a cam chain tensioner, secondary throttle valve actuator and front caliper was recalled. On the newer ones you're also looking at a stator recall.
So a decent bike, but not without its issues like some people make them out to be.