I tried this product in small applications that I developed. Its speed is really impressive. I think it has a scalable structure. I think it will work effectively when used in large-scale applications. Moreover, it works in perfect harmony with Redis. It will be among the my stacks.
Longtime Redis user in my professional roles and OSS projects.
I've been looking for a truly serverless solution for a while, with a global presence if possible... Upstash fills both needs, and support has been quick when I raised an issue. Wish the product and team all the best!