Our company uses Techarex for QuickBooks hosting for our operations throughout the US. We have been without service for 8 days and counting. On 5/18/2018, a tech support voice mail indicated "they are having major issues with their infrastructure and expect it to be resolved within 48 - 72 hours. Calls and technical support tickets have gone unanswered since then. If you call support, you are on hold for 30 minutes and then disconnected with an automated "Good-Bye". There hasn't been a response to our ticket as of 5/25.
With the dependence on Techarex for accounts receivable, accounts payable and payroll, the low price doesn't justify the operational risk.