I personally kinda liked Big Robbins. I appreciated the huge amount of unnecessary detail. Of course, one year later I now remember nothing from it, but it's interesting to know just about everything there is to know about the disease.
All that said, it's not a good use of time if efficiency is the goal. I would essentially read Big Robbins if it was interesting, skim it if it wasn't, and then actually use Pathoma/Rapid Review for real studying. Robbins is just too beastly to actually study from.
For board review, Pathoma is sufficient IMO. Rapid Review is a good second source if you want more detail.