I got this as a promotion item for purchasing the 6176. I love the UA plugins, they sound great. Some things that I didn't like is that when you go to add a plugin to a track all of the available plugins that ua offers show up. so you may add a plugin that you didn't purchase which would activate a trial period of that plugin if you choose. I just wish that there was an option to just show the plugins that you purchased to save time. I made a list so I can refer to it. also the unit drops out every now and then, it's an easy fix, you just have to power off the device and power it back on. Another great feature is in the control panel for the quad core, it shows you all of the plugins that ua offers, the ability to purchase them with a click of a button and better yet, If you have a plugin that you want to know more about, just click on the question mark and it brings you to the plugins page where it tells you everything about it from history to what it is used for to the controls and how to use them. Great feature for a newbie like me with this unit. You can't go wrong with a UA product and Sweetwaters customer service and support is top notch.