I've been looking for an ECD series for a while and finally came across one that looked to be in good shape. I had an ECD-413 about 10-12 years ago and to this day it was by far the best HU I've owned. The SQ from these units is amazing. Just picked up an ECD-415 and I was shocked when it arrived to see that it was in near mint condition. I installed it yesterday and tested all the radio functions first. All was well and even though you wouldn't associate FM radio with SQ, you could immediately notice a substantial improvement in all around sound. At this point I couldn't wait to load a cd! That's where things go south.... Tried to load a cd and it would go about half way in and then eject. Tried it multiple times but it seems something inside the unit is blocking it. The seller offered me a refund but I think i'm going to contact eclipse about repairing it because this unit kicks ass. Hopefully the seller will just refund me a portion of the sales price instead. Even though this is an old unit and hard to find in good shape, I would highly recommend it if you come across one.