Xero Bridge by Parex

So far this app has been great! The set up took a little long mostly because some of the steps were phrased weirdly, but it was simpler than it seemed. Because of the issues I had during set-up (and how long I went without a Shopify integration) I relied heavily on the customer support team. Kumar in particular was very helpful! It's such a relief to work with customer support that's ACTUALLY helpful, understands the problem, and knows how to resolve it.
It has a higher monthly maximum than other apps we've used, which means less manual reconciliation on our end.