It's a very quiet route. I walked in June last year, and even in major stops like Montpellier, I was usually the only person in the albergue. In the rural areas the albergues are run by the Mairie, so you need to get the key during office hours, which can be very random and often exclude weekends. Private accommodation (which is few and far between) is very expensive, and facilities in the village are often closed so you need to pack food in advance. I always managed to find a place to sleep - I used the list on Gronze - but many places are closed, and I met pilgrims who'd spent the odd night in a barn.
I suppose it depends on what sort of camino you're looking for. I thoroughly enjoyed the solitary walk through the beautiful countryside (especially the 10-odd days in the Haut-Languedoc nature reserve) but I did find myself missing creature comforts like café con leches, the security of knowing there was a bed and a meal waiting for me, and the company of other pilgrims. People often describe this as 'more of a GR route than a camino', but I have to say that I actually felt more like a 'pilgrim' on this route than I had in a long time, because even though it was tough and lonely at times, there was a sense of 'something' keeping me going. Overall, it can be a very rewarding walk, but it's definitely the route less travelled!