My spouse and I walked it in 2011 - from Sete to Toulouse, and then onto Ste Marie Oloron. So long ago, so not sure how relevant.
It is, obviously dead flat and very easy to walk, apart from having to leap off the path frequently to get out of the way of bicycles. There were still plenty of trees so lots of shade. In the spots where the trees had been removed due to fungal infections it was much less attractive. I'm hoping that trees have been replanted.
If it were not for the fun of making friends with people in boats (they passed us but we would catch up at the locks) it might become boring. I was incredibly pleased once we got off the canal after Toulouse.
Accommodation was excellent but expensive, because we were staying in bed and breakfasts, not gites. I do remember excellent food, although often we would get the same meal at night two or three times, because the distances are set up for bicycles, rather than walkers ("this is cassoulet, the dish of this region", and the region would continue for two or three nights).
www.french-waterways.com
