What's so good about Ark?
Well, ARK is user-friendly. Also, ARK has a system in place called Anonymous Network Integration where they allow users to send transactions. This system has a ton of privacy features that can be used.
What I don't like about Ark is that many goals in the original White Paper are not finished, including push-button clonable blockchains. Without dates estimates, we don't know if/when these things will be released.
Interesting point. But on the other head Arks team consists of big names and well-known high-class professionals.