Hi phenomenon, I've been with Alpari for about 4 years now.
- withdrawals have been timely with no fuss, although I did once have to re-submit a request as my signature had 'evolved!' which is fair enough.
- do sometimes get re-quotes in a fast moving market when using market orders, but this is just a fact of trading
- have had slippage both positive and negative, although not very often at all.
-they did once reverse a loosing trade with no input from me. It was a limit order and I was away for the trade so I don't quite know what happened- must have been a price spike or something. Anyway point being that it did give me confidence in them.
- their platform is very reliable although it has frozen once or twice on big news events, however I don't actively trade the news so this doesn't affect me.
So all in all I'm happy enough with them.
- best of luck