I’ve found the UI to be pretty poor in some respects.
Plus they don't have any relevant tools that would help to make a well-informed decision.
I’m not a day trader — almost all my money is in long term held stocks and crypto — so margin interest rate is all that matters. (For options, I don’t think I suffered any execution issues, because it almost always has involved a limit order in a low volume option.)
You cannot easily see what options are over or under-priced IV-wise. It also does not notify of any important events that might affect your options positions.
For example, when someone owns a deep ITM call and ex-dividend date is approaching, it might make sense to exercise that call and buy an identical OTM put. But most retail traders are unaware of such technicalities and therefore in the long run sustain losses caused primarily by such basic mistakes..