[sleepyhead]

I looked very closely at Braintree but ended up not implementing them because of their €100 minimum per month. I don't understand how you say their API is complicated. It is well documented. The Ruby Gem also seems quite good and easy to implement. As you host the form and data is sent to Braintree there is also very little to get it up and running.

[robotmay]

It is well documented but they use a lot of terminology which makes it annoyingly obscure, and the control panel is very confusing if you don't know any accountancy vocab. There are far simpler alternatives which cost less and do the same things.