To be honest I'm not quite familiar with the AEUC module because I got rid of it really soon after I installed it. But the product features, if a product has features, are listed under the title with big enough font I think. VAT number looks easy implementation and I'm sure the developers of the module will add it as feature if they are asked to. Custom payment methods will work, and if they don't they will make it work for sure. I read some reviews about their services and I can't find negative review yet. And even more, I saw recently blog topic by @lesley that they officially support TB. I don't know what CPM is, sorry.
I'm not working for them :) I just loved the product and it's features which are many.