Metadoro has 2 platforms. You can both trade and invest. Now, many brokers gives opportunity not only trade, but invest. Metadoro is doesn't lag.
As for me, this is the first company where I successfully made money and never had a slippage. I continue to trade here because I have a good impression and experience of trading with Metadoro. Moreover, there are no serious disadvantages here to think about other brokers.