Absolutely, I love some of the librevox readers and have found new books I enjoyed immensely just from seeing what other things the ones I enjoyed had read, i found it a good way to find new books for a while because usually they are reading other books they personally enjoy that are similar to the one I had looked for initially.

Likewise just because they are "professionally read" doesn't make them good by default. Some peoples voices or accents just don't sit well with me trying to listen to them which is no fault of their own and personal preference on my part but some are just plain bad and I can't believe someone paid them for that work and found it acceptable enough to release it into the wider world :D