We went through two rounds of migration. First placing our data warehouse, where BigQuery was just so far past Redshift it was almost a joke. Then we wanted to move to a cloud provider with good container orchestration and GKE was obviously better than AKS and all of Amazon's proprietary orchestrators. It was pretty good.
Customer support varied between excellent and ~fine. Amazon customer support throughout that time (we had a few small bits on Amazon) was fine, but less enthusiastic about winning our business.
Not long after a friend of mine reported a security incident to AWS, something that looked like Amazon privileged access to their data, and it took months to get a response from them, and it was never an adequate explanation for what looked in all ways like a hack.