I recently blogged my experience here: http://callmeed.posterous.com/choosing-a-cmbb-stack-for-my-startup-corporat http://callmeed.posterous.com/choosing-a-cmb

I recently blogged my experience here: http://callmeed.posterous.com/choosing-a-cmbb-stack-for-my-startup-corporat http://callmeed.posterous.com/choosing-a-cmbb-stack-for-my-s... A couple things to always check/ask: - Is the data portable/exportable? If not, then you're in for a headache down the road should you want to move to a different provider (i.e. possibly forcing customers to re-enter their billing info). I almost made the mistake of choosing a merchant that doesn't allow this, and it's the main reason I ended up using BrainTree. - Get the details on rates/fees. Some merchants will quote you a low rate but you have to be aware that rates can vary slightly depending on other factors. Just don't get too hung up on choosing the lowest transaction rate.