Why not call them up and ask for an online demo of Express? That's what the sales people get paid to do
I believe that seeing it "live" would give you a much better idea than looking at a few still shots, because how you imagine that I got to a certain point and seeing how it really happened can be completely different.
Do you have some solid or surface cad software already? If you do, you might be able to make good use of it in combination with Express, because you can import solid models, but you cannot actually create surfaces and solids in Express. The general idea is that you will extract edges to create profiles and pockets that you can use the "2d" toolpathing methods upon.