Zendesk has been an amazing tool for our company. I built our Zendesk from the ground up, and not only is it intuitive to build and implement, but it offers ways to automate customer communications, identify targets, trends, and SLA's, and give us complete visibility to our customer's needs and our own performance (where previously we had zero visibility). Working with the Zendesk team has been a great experience as well; anytime I have a question they are quick to respond and knowledgeable about the product. We implemented phase 1 of our Zendesk by moving from email-to-ticketing, and we just released live chat, the knowledge base, and the customer-facing web ticketing (feedback) options. I am a huge fan of Zendesk and encourage any companies looking for a ticketing or CRM system to give Zendesk a thorough look!