Anyone using a Curt Echo brake controller?

I got one last year, and love it! I have a 20' trailer with electric brakes, and wanted to be able to move it with my Jeep GC which had the right plug, but no trailer controller. I got the Echo, and it works great, particularly regarding the trailer brakes. I can monitor brake operation on my Iphone, and control the amount of braking with it also. Saved me from having to wire in a controller and I can use it with any other vehicle I may have to use.