Comment by minhajuddin

I have built quite a few rails apps using TR. The braintree ruby gem makes the whole process very easy. I would hesitate in using this because you still end up explaining a lot to during PCI compliance. IIRC during the PCI compliance my customers had to do a whole lot of work even when we were using TR. Splitting your process into multiple steps and doing validation using JS is much much easier IMHO.