No email/docs provider will be perfect, but out them all, Zoho is definitely a great option. I used to use google until they connected YouTube and Google+... I don't want my coworkers to know that I commented "lol" on a Taylor Swift music video.
The main services I use in Zoho are their Docs and email. The only con would be the fact that Zoho is a relatively small company, so it would be hard to tell how much protection they have against hacking. Regardless, I will continue to use Zoho and be pleased with all they have to offer.