At this point, literally nothing. The system worked fairly well until we had to create more than 1 coupon. Then the recurly team was disastrous with Support and follow through. Their functionality has huge flaws in coupon functionality.
Their coupon functionality is bogus at best. You can't assign other plan types to coupons once created. Any business, especially a fast-paced business, often has the need to introduce new plans for their customers. You want to honor some coupons for the new plans. Recurly doesn't support this. When you ask them, they say it "might happen sometime in 2019". That could be *two* years from now. Then, they try to get you to pay $600 for their prof services team, meanwhile ignoring your requests. They tell you
Even worse, when you point out deficiencies in their UI they tell you to pay their Proffesional services team. When I inquired with the support team, they said they'd escalate it. This is an easy fix to do on the back end of their software. Instead, I waited hours, had to check back in again, and was told that they wanted to me to do a workaround (which is not a workaround at all- it won't even work. And I already explained why this isn't viable).
Pretty much none. Their customer support has been horrendous. 7+ tickets and emails, their team will take months to send you a follow up email, and when your issue "gets escalated" they just respond later giving you the same answers as if they never listened at all.