I've been using them as my payment processor for a while and was able to process substantial amounts with no issues. Excellent support and a very straightforward integration process. It's a shame they don't have more reviews. As a merchant, I honestly think they exceed expectations Review collected by and hosted on G2.com.

Can't think of any major downside, I only wish they had a mobile app but other than that, I'm more than pleased with their service Review collected by and hosted on G2.com.