BEWARE: They'll keep billing you long after you stop using the service.
The software itself was fine while we used it — that's the only reason this isn't zero stars. The real product Riverside sells is sneaky recurring charges. After we stopped using the service, they continued charging our credit card month after month after month. No usage on our account, no engagement, nothing, just automatic charges quietly draining our card.
When we finally caught it on our statement and contacted them, they flat-out refused to issue any credit. Not even a partial refund. They were perfectly happy to take months of payments for a service we never touched, and perfectly happy to keep every penny once we noticed.
This is a business model built on hoping you don't read your credit card statement. Check your card carefully if you've ever signed up with them, and think twice before handing them your payment info in the first place. We won't be back, and we'll be telling everyone we know to stay away.