We have been working with PayMotion for sometime. Yes, we have tried other payment processors, which we still use for certain situations. But, our "go-to" processor is PayMotion. It is a very flexible platform, and conversions and revenue are very good. If you ever have a problem with them, they are super responsive in resolving the issue.
We sell our software and tech support services worldwide. There are just a few minor, Tier 3 countries, where they could perform better. But, for the huge Tier 1 countries, PayMotion is our "go to" processor.
The Number One benefit - more revenue. We see higher conversions with them.