system
A chat on subreddit /r/wallstreetbets
human
Is this Ally Invest, OP? How is it?

gpt
It is.  
  
 Downside: The mobile app is very limited. For example, I can't see Greeks on mobile. Trades are not totally free. 
  
 Upside: The desktop version is pretty powerful. They have pretty low fees and I can make complex trades. I like the educational features they have. Taxes are easy.