Zoho campaigns, specifically email campaigns, allow you to customize templates and the way that emails look to have consistent branding when you reach out to your leads or new contacts. I like that through cloning, my emails have a similar feel so my clients can tell it's us just by the way our emails look.
There are just a lot of features Zoho hasn't incorporated yet compared to bigger CRM tools. One of the biggest features I'd like to see is the ability to build smart lists based on clients interactions with our emails.
Zoho is an inexpensive, great option for very basic email campaigns.
We had a pretty big database of contacts, near 13,000 leads, but they were acquired over two years and no one knew which were good or bad. By using Zoho, we have been able to clean up our lists and narrow our targets within our own database.