First, sorry about my englsih.
I've purchased Professional Plan (512RAM/5GB HDD/500GB BW) at IP Systems Limited. After a few minutes connected, I've lost with the server using PuTTY. Ok, let's try again. 15 minutes later, AGAIN! Now, let's try other VPS to continue the work... NO, 10 minutes again. Other VPS location? Yes, but no success.
I opened a ticket to solve this issue and: http://s17.postimg.org/w33ija95b/systems.png Just like you are nothing and CLOSED.
Run away from IP Systems Limited!