I agree 100%. We have been working with Tony over at EZ Merchant Solutions for over 5 years. We started way back on version 2 when we only had 1 website. We now have 5+ sites on cs cart. We have purchased many of his addons, but he is our go-to guy whenever it comes to any cs-cart custom modification or question.
We've tried other "overseas" developers and details get lost in translation and you have to wait 24 hours for a response. Tony is US based and in the same Pacific Time zone as us, so he is always responsive. I emailed him yesterday morning to develop an api for a third party addon(Yotpo) and by the afternoon he had already completed it. He stands behind his code and wouldn't hesitate to recommend his services in a heartbeat.