Traded with them 2 years ago on their 999 unlimited. The account is still open, Have not traded with them since then. At that time they had the NEST platform.
About their platforms,
Recently they have come out with new Trading Platforms.
I used Their desktop platform which is as same as pi to backtest some tradescript scrips. What I found is all the bugs and limitations you find on pi is there too. Its the same thing with a new uniform.
Their new Web Platform Screenshots here:
As @amythraj mentioned, my experience with the customer support was exceptional, also the contract notes was proper. Never faced any notable hindrances as such.