In opinion of many people coin mixers are very bad tool that help very bad people. I belive that you trust in service that you advertise, but can you be sure it doesn't help criminals?
In the opinion of many people,
the internet,
VPNs,
Tor,
cash,
bitcoin,
encryption, privacy is a very bad thing that helps very bad people.
Please read this post, and my reply to it, for why this argument is complete nonsense:
https://bitcointalk.org/index.php?topic=5214200