Recently I received a copy of the ESV Study Bible from the publisher, Crossway Books and Bibles, for review. Hopefully I will be able to get to this in the next week or two.
Meanwhile, you have the opportunity to use the ESV Study Bible online free of charge until March 31, 2009. The Bible has been available online and in several computer Bible programs for some time. The Study Bible has many additional features such as explanatory notes, charts, maps, diagrams, etc. This will give you a few weeks to read some passages you may be studying and check the additional resources.
Check the ESV Bible Blog for complete information.
Or, you may go to this link, create a login and password and begin using all features of the ESV Study Bible.