I have been using TradingFxVps for about a year and will migrate to somewhere else next month. Up until August 2017, there were 2-3 system downs during trading hour. These are understandable and forgivable. In August, there were a couple of power failures leading to power maintenance at the end of August. However, in September I found that are still some reboots happened. Seems like power maintenance does not help. And till today, it rebooted 3 days in a row during trading hours.
Regarding the support, they are quite fast if you ask questions that they are willing to answer, e.g., how to setup things. If you report problems, sometimes you need to wait. Additionally, support is not 24/5 online. I have experience that I received an email from the support in the evening, then I replied back to them about 20 min later, I needed to wait until next morning to receive their reply. Anyways, thanks for great support until last couple of months.