+1 to codelitt's suggestion. We've been running our stack for Tenreads (http://tenreads.io) on DO since the last year now. Wouldn't say we are running a high throughput flow for our backend/web apps, but with our core pipelines, DO has been a really good choice with, to quote codelitt again, "sweet spot of cost and performance".

PS: We've been facing issues with certain regions of late, but the team is fairly responsive and helpful with getting fixes through.