Anyone have thoughts on the 70-623 exam? I just finished with 70-620 and decided to go with 623 before moving to 622. I've read through 3 chapters of the MSPress book and it seems awfully similar to 620. Ultimately 623 will have very little impact on my job/career but it’s hard to pass up a certification when it's similar to the test I just took and it only requires 1 more test to get a new certification. Thoughts on the exam?