[otrs] References

Hello, I've been using OTRS personally for quite some time, but we are looking for a new ticket system (currently using RT) at my place of employment. Beyond showing my boss demos of a system and how it works, he also wants references from people who are currently using it as an IT Help Desk and/or Sales/Customer Service Help Desk scenario. Is there anyone out there reading this who would be willing to be a reference with your thoughts/experience on OTRS? Thanks, Kris