I'm not very familiar with the original Bible stories that The Red Tent is based on. After reading a few other reviews, it seems many who are familiar feel this was a big departure from the 'true' stories. I didn't read this for an accurate retelling of a Bible story, so I have no opinion on the accuracy.
Overall I enjoyed The Red Tent. While I understand this is one person's creative view on how life was for women back then, I think the picture she painted could have been very accurate. There were only a few parts that I felt dragged on longer than necessary. I'm looking forward to watching the mini-series now.