haha I am the developer of it so I can't really say anything lol. Although we don't have OTC, a lot of other stuff is free on the website so give it a go with a free account. Always happy to answer questions.
It looks good, I'll definitely give it a real try if I start trading options more, the order flow data alone looks like it would make it worthwhile. Do you incorporate L2 data? Couldn't find that anywhere, only thing that seems like its missing.