One of the best simple and affordable crms out there, I've been using it for years and I can say they nailed almost every aspect of a simple and streamlined workflow.
Only thing I wish was better was the email integration and tracking which can be confusing and clucky at times.
I like how comprehensive Zoho's suite of services are, it may be a bit daunting and overwhelming at first given all the different settings, features and pretty much just everything you can do with it.