Purchased one of these along with radar end of Feb. Finally got it installed. Worked fine. Notice past tense. Yesterday, I performed the software update to ver 3.15 to the letter and per verbal instructions from Raymarine. Worked fine last night. Powered up today to input date/time etc etc. It slowly just quit working to the point that I had to do factory resets just to change modes. And, we're leaving in a few days....After my blood pressure subsided and my wife would talk to me again, I headed up to the local West Marine where I bought it. Those guys are to the point where they hide when I come through the door but they were great. I told them I'm leaving and I bought it months ago and just installed it. They told me to go get it and, fortunately, had one in stock that they traded me for. Kudos to Anacortes West Marine. The original one also had cables that didn't even physically fit any connector on the back. Had to "order" the proper cable. The West Marine guy ordered cables from several retailers on his own credit card to help me out. (out of stock).....Finally got cables and I'll tell ya... If I didn't have a radar half way up the mast, I'd gather all this crap up and buy an airplane ticket to wherever Raymarine is and put this stuff "somewhere"....If you have an e7D, I would not recommend updating the software. Leave it at ver 1.11. In fact, I'd recommend going somewhere else....