Tredero has grabbed my attention only because of the range of assets and their proprietary app. Sincerely speaking, it makes a sense to add some more platforms, but if this one performs well enough, maybe it's not necessary...
I trade here forex as a daytrader and sometimes switch to positional stocks trading. Leverage is high that a big plus, spreads are narrow but it depends on the account you choose. Mine one is Basic, everything good enough on it. There's even a dedicated relationship manager =)
Company cares about clients and this an advantage.