I've done it before,
Can't remember too much
Very small field, I thk there were 9 at the start, and five finished
A lot of good surface traffic free cycle routes beside waterways (flat)
Had dinner in a lovely Town square in Charleville Mezeres day 1
challenges of buying food in two other languages (Dutch not needed, everyone speaks English)
I remember an excellent descent after a long climb after moving west away from the Rhine
I had lousy weather riding beside the Mosel River was ready to quit, but felt better by the time I reached Koblenz
due to losing my main light on the eurostar journey, and relying on my head torch, I spent some nights sleeping beside the road.
Overall I quite enjoyed it, I felt it was a a relatively easy 1000km with the route mainly following rivers, with bits of climbing over the hills between them.