I signed up for QuickBooks hosting last year with AceCloudHosting. Setup was performed instantly, right after the payment. I had no issue with their price and support; these guys are very good and responsive. But their servers or data centers are somewhat slow; they are not providing server uptime of 99.9%, as promised.
So, based on their service I have received overall positive experience and hope they would keep their promise of server uptime.
Response from Ace Cloud Hosting:
19 January 2015 at 23:11
Thank you for the feedback Kevin. We sincerely apologize for the issues faced by you. However, we have resolved the issue by getting new data centers. You are now sure to get 99.9% server uptime with us. To know more about out data centers, you can visit: http://www.acecloudhosting.com/data-centers/