In the last September 28th I've passed my 1st microsoft certification. In fact, I've passed 2 microsoft certifications!! Yes, I was able to do both certification exams in the same day. It was my very first experience in certification exams.
I've got 1000/1000 pts in 70-452 and more than 900 pts in 70-448 (I think I missed 1 question). I believe 70-452 is easier, but this is my opinion.
My study/training was based in Testking and I had 3 weeks to be prepared. Not that I wanted, but because my company said so.
3 weeks were enough in my case, considering that I only trained at night, after got home from working. But I will suggest you to take 3 weeks for each one of them.
Good luck for those you who are willing to get certifications.
Skills Being Measured (70-448)
Skills Being Measured (70-452)