I traded with RB Options for a couple of months. I would say that their platform and prices are good. Their customer service is also good.
Everything went well until they realized that I was making quite a lot of profit and had about tripled my account. Then the problems started to happen.
They started adding a HUGE spread to every trade I made, such that it became almost impossible to make profit on any trade.
I sent many screenshots and videos of the issue to their Support and my account manager. However, as expected, they claimed that everything was fine according to them, and that price was simply moving quickly.
After going back and forth without any success (in addition to losing a few trades), I decided to leave them.
So my advice is, you can trade with them. However, if you start to make a lot of profit, it is a wise idea to find an alternative broker.