Brussels Info will steer you (or get your clearances) for you. It is possible that Belga Radar will take over from them if you're going near the ranges towards the German/French border - but they'll sort it for you as well.
Lazy flying, definitely. Safe flying, definitely.
It is extremely rare that I can't fly an absolutely straight line out of EBCI to my destination - they can usually coordinate the whole thing. Great service.
Fly safe, Sam.