For us it was a mixed bag. Visa took a bit longer because of the compliance checks, but the technical setup itself wasn’t bad. Skrill, on the other hand, was up and running in just a few days. What saved us time was using a platform that already had most of the gateways pre-integrated — instead of writing endless code, we just adjusted configs. If you want to see how some platforms streamline it, https://nowplix.com/platform/modules/payments shows a decent example of that approach. Having built-in monitoring and error logs also made the rollout less stressful.