I've played around with both Trancenders and Test King (although I've never taken the final step to get ceriftied - this is out of sheer laziness and wanting to donate to Prometic and Microsoft coffers). I like both of their interfaces, but as I've encountered more Trancedeners than Test King, that would be my personal preference.

Where possible, I think a lot of the cram areas only deal with nuggets of the subject matter, rather than a whole scope of the matter. Nuggets are great for passing exams, but for implementation in real life (not that you'll use half of it), you need a fuller understanding of the product.

Although working for my organsiation, I've had to beg for a day out to go to a Microsoft Technet event. And even then I had major issues getting the train travel expenses sorted (let alone the thought of air travel)