I did this in 2007 and 2009 and the signing improved greatly. The Amics de Cami de S Jaume in Barcelona have a useful guidebook--I think it is in French as well as in Spanish and Catalan. There are not a lot of albergues on the route, but it has improved in recent years (new or improved albergues in Huesca, Barbastro, Linyola, and La Bolea, for example). In Igualada, La Panadella, Cervera, and Tarrega, and Linyola I stayed in hostales. There is an albergue in Tamareite de Litera but it was being used by fiesta-goers when I was there. I also used hostales in Balaguer, Alfarras, and Monzon.
As pueblos tend to be far apart (usually 15km), you will need to watch your water and pack some food for the day-- you cannot count on finding a handy café with bocadillos.
At every stop, people are helpful and welcoming. You may well be the only peregrinos that day or for the next few days. In two traverses of this Camino, I only met two other pilgrims, although there were some a few days ahead of me.
When I went last, there was no information on the Monzon-Huesca stretch in terms of accommodation, so I skipped that part and went by bus. Since then, I have discovered that there are hostales and albergues on that dry and lengthy stage. Loarre had only a hostal (a bit pricey) but there was a camping and restaurant on the road up from the pueblo to the Castillo de Loarre.
The crossing of the Sierra de Loarre should only be done in good weather, as there are no (as in No) facilities whatsoever between Sarsamarcuello and Estacion Santa Maria, where there is a restaurant near the railway station. On both occasions, I took the train from there into Jaca, as there was nowhere to stay, and absolutely nobody seemed to know if the albergue in Ena was legendary or not. Perhaps better information has become available.
There is a previous thread on this somewhere, where I may have provided more detail in a post a few years ago, and the Amics in Barcelona or the Huesca Association (who have a good reputation) may be able to give you a few more details on recent changes. I really liked the route, but it is very solitary.