I've signed up for their services and I can put a short review.
1. Till now they have only BRAC bank support. Frequently my clients faces issue with Card Processing, and actually the issue was with BRAC's end.
2. Your clients must have to go to BRAC's gateway page crossing a page of EasyPayWay. Actually I signed up for their service observing amarbill.com, there, customers don't have to face any page from EasyPayWay, but you don't get that feature.
3. Your customer will get transaction failure notification from EasyPayWay, not from BRAC. In my case, my clients were confused actually to whom they are going to pay, me/EasyPayWay or BRAC!
4. Their support is awesome, friendly fast and fantastic at all.
5. Till now my clients are shown a logo of them in BRAC's page, so currently I'm not using their system, 2CO seems more flexible to me than our local gateways.
Hence I should tell a bit more, all of my clients are from USA, I'm not connected with web hosting/domain registration related business, I'm actually providing Web and Mobile application development related services.