Last week I passed:
Exam 457 Transition your MCTS on SQL Server 2008 to MCSA: SQL Server 2012 -Part 1
Which will help me to qualify for Microsoft Certified Solutions Associate for SQL Server 2012. Now am preparing for 458 (Part 2).
The exam was moderately hard and I had doubts about couple of questions. Anyways getting through the course material helped me a lot in knowing SQL Server 2012.
Cheers!