I haven't read the Outlander series of books by Diana Gabaldon. I've only recently found her website online and then saw the promos on Dish for the Starz channel so I signed up.
We've watched the first two episodes and, actually, I watched the first episode twice! Love the series so far. The characters are believable and charming. It seems very historically accurate which makes me love it all the more. The costumes are correct. The food is correct. Here's a video to watch.
I enjoy the series Reign, however, none of it is accurate. It's more a fantasy series based on historical characters. Outlander is something different entirely and there are NO commercial breaks!
The one thing I should warn you is that there are some sex scenes which can be explicit. I would not watch this series with children or even teenagers. I read a post on one of the Outlander Facebook pages where a mother said she watches the show with her 15 year old daughter. I thought it was rather lax judgment on her part as a mother.