i use them a lot, because fees are lower than cryptopia (especially withdrawl, but also trading fee).
The interface of cryptopia is better in my opinion, but the cheaper trading and easier transfer makes this my nr1 exchange.
It's seems supported by a big company and sofar so good. But remember to never have coins for long on an exchange, not even a so called "good" exchange.
Always have your coins, where you can control your private keys yourselves!
where can i get the deep onion wallet?
Go to: https://deeponion.org The "Download Now" link is on the right side of the page under the Earth video .
After the download, you can search on DeepOnion forum for advices and many tutorials for the installation and conf.