The first two adaptations (Angels Fall and Montana Sky) were disappointing for someone who read the books. I was actually pleased by Blue Smoke.
They did a good job of adapting a complex book down to a short movie. The flashbacks were a great way of letting us understand Reena's history and her current emotional state. Of course, they changed some of the details, but those changes didn't bother me, and worked well for the movie. And I think they did a good job of casting for this one - Alicia Witt and Scott Bakula were very good.
The only complaint I have is that due to the short time constraint, they were not able to really focus as much on the relationship with Bo, so the chemistry wasn't as strong as it could have been. Matthew Settle is very cute, but we didn't really get to know his character.
That said, I enjoyed it.