Ask HN: IS the time saved using cloud services worth the reliance?

I am just wondering what your experiences have been using cloud services for your business. There are a lot of posts about the services people use (subscription billing, help desks, project management etc), but I am wondering if you regret not having control yourself.

Reasons for not using so many services is that you can fix it when there is a problem, you have full control to change and maintain it as needed.

Do you use these services? are you happy with the choice? have you brought them in house when you could afford to?