Yes I am using Roboforex for a long time and until now. Its a goo Broker, but has not the best conditions. If you want to use Scalper there where be better Brokers.
The free VPS that they were be offer is ok for that you nothing pay for but its sometimes really slow. So payed VPS at this are very much better.
But at Roboforex I made money every month and what's special, if you trade 1 Lot or 10 you made extra money via Payback every Month. That is according to your account balance really good extra money.