It will depend upon the number of issues you receive in board daily and section you created (sales, billing, support). If number of tickets you are receiving is large I will suggest you to use kayako ticket system or you can use WHMCS. It is easy to handle for limited number of tickets.
LOVE THE WHMCS SYSTEM, ITS WICKED, GENERATES US DISCOUNT CODES, EBAY MESSAGES AND EVERYTHING, KEEPS ON TOP OF ALL OUR CUSTOMERS, CANT REALLY FIND A FAULT WITH IT ONCE YOU GET USED TO WHAT YOUR DOING OF COURSE LOL
I said it does the job, but sometimes one of my employees assigns the ticket to me and than the ticket gets set as closed. Or When someone answers a ticket saying "Wait for an admin reply" and then he assigns it to me it still gets set as answered and not opened. I was also wondering why people do that just use Kayako integrated with WHMCS?
This would be because he is not changing the status of the ticket back to "Open".
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I find WHMCS to be the best support ticket package out there, given its customization flexibility, and how fast it interfaces with its database. Plus, the fact that it's an industry standard doesn't hurt, either.