The CEB Study Bible is a well designed and excellently written study bible that distinguishes itself from the crowd by taking a more open-minded approach to the historicity, date of composition, and authorship of debatable sections of the Bible. However, the appeal of this study bible may be narrowed by its inextricably being tied to the CEB, a translation whose eager pursuit of a laudable goal (to produce a truly fresh translation free from wrongly embedded conservative Evangelical ideas) unfortunately results in uneven quality.
Despite some questionable type-setting decisions that limit the usefulness of this Bible for an aging Christian population, the NIV Zondervan Study Bible is one of the best and most comprehensive study Bibles currently on the market. Its focus on biblical theology pays off in a big way. I highly recommend it.