I've been using DO for around 6-7 years now. Really happy with the services overall. I hope nothing changes after IPO'ing.
The only complaint I have with them is DO Spaces. This service seems to have issues related to degraded quality pretty often and there's so many horror stories of load times taking hundreds of milliseconds to serve content from their CDN if you Google around for folks using Spaces. I'm looking forward to the day where Spaces is as good as S3 because DO's offering of Spaces includes not only an object store but a free CDN on top. Seems like a good deal for $5 bucks a month if it were dependable.
It's weird because every other service I use by DO has been top notch.