I can confirm it isn't dodgy, I am a developer of the site. But I do understand you hesitation. I too am very wary of security as I know whats capable through the internet.
I do hope you come across once you have done you research, its good to have big STEEM community members like yourself using out platform.
If you simply have any questions, hop on over to our Discord server: https://discord.gg/fW7Q4HZ
Our team is big enough to answer any questions you have swiftly.
Well complaints on the site being into programming I know what a pain in the ass it is. The site is very well done with great interface much better than I could probably do being more a systems guy. I'm doing some Node.js front end stuff and it is hard to pull together such a nice interface at least at this point in my learning curve for Node. And the site only needs posting which doesn't allow withdrawal so that does mean it is safe for use. I didn't mean any offence to your work. I was more just bitching about the lost SBD bit of a rant I guess.