If you liked the first four seasons of Bones then you will probably want to buy this, and will be entertained. We were, and we didn't regret getting a copy. But it's definitely a step down from the previous series.
The plot lines are full of the same quirky circumstances, police antics and pseudo-scientific leaps as ever. They are more outlandish than before, bordering on the completely unbelievable (rather than simply the "unlikely" kind of unbelievable that you'd expect).
The characters feature more - the relationship between Bones and Booth is explicitly discussed rather than hidden by innuendo and sexual tension. We felt like there was little interesting development in the characters and their inter-relationships throughout this series, and the crime plots were less addictive. It's okay, but if the trend continues then we watch Series 6.