The best episodes surround the Golden Hind arc of 3 episodes, dealing with a lot more serious issues than normal on the show.
As a DVD set, there are plenty of extras. A couple of excellent commentaries by Kevin Sorbo and Michael Hurst provide wonderful insights into the making of the show and into the whole process of making a TV show in general. There are some nice interview clips too.
If you like this type of show or are already a Hercules fan AND can play Region 1 DVDs, I highly recommend this set. The one or two episodes that were weak, along with the fact the design of the DVD set is a little odd...with episode 22 on a disc all by itself, loses a star though.