I was reading some posts concerning Ring Central and thought I would provide my opinion.
Ring Central offers a great product. The problem is their reliability. They are not a good service to use for company's that require any mission critical services. Ring Central will not provide any statistics about down time because they have too many issue that cause their service to fail.
In a nutshell, Ring Central is cheap because they follow the walmart strategy. Sell as much as you can and only some people will return the product. They don't even refund your unused fees charged to your credit card unless you ask them!
Think what you may, but if you use Ring Central for any telecommunications service, you will think back to when you read this posting.