Well I did the 70-536, and it was not as bad as I thought. If you have been using .NET as long as I have it was just remembering the different was to access class libraries of BCL (Base Class Library). There was a lot of security related questions, so be sure you understand Assert, demand, etc. I had few service questions. I suggest writing a simple service to understand the different events, like start, stop, onstart, etc.
I did get a few COM interrop questions which where pretty easy.
Bottom line read the questions carefully, as some answers are very similar, only on word or part of a word is changed, and it is easy to skim over it and miss it and get the question wrong.
I got 841, the pass was 700. So I think I did okay.
Well, next on to the ASP.Net exam, which is 70-562. Back to studying.