The only advantage of it, if you can organise the thing, lies in the seating allocation. But this seems usually very uncertain in its benefit. Have to say that, especially on KLM, I find that the best seats in either class always seem to be blocked off permanently. Those who end up sitting in them, it has been remarked, always seem to be KLM employees.
When I eventually got to the seating plan page I noticed that there were only a couple of free seats available..... This was 24 hrs ahead of flight time.
I wonder if they permanantly allocate everyone to a seat on the flight and so you only get to change to a vacant seat? If so this defeats the whole point of choosing a seat.
I am on a night flight with hand luggage only and so wanted to get a window seat to curl up in, it was the only reason I attempted to check in on the internet, I dont usually bother/persist if I have hold luggage, 'cause you have to queue anyway, the "fast bag drop" isnt fast anymore!!!
Regards, SD..