Downloaded the app shortly after I got my CDE-HD149BT and saved a few different tuning setups. Pretty helpful after having the battery disconnected & alot easier to adjust while listening than going thru the menus. Now with the latest update my Iphone doesn't connect after trying everything so this app is pretty much useless now.
First of all, this is great for easily getting at the more advanced sound settings without having to deal with the deck's endless scrolling lists. It's also nice to know that all my settings are saved for when I inevitably disconnect the battery and the deck reverts to stock.
That said, the app is missing the ability to open a previously saved tune and simply update it vs. having to create a new one. Every time. Kind of annoying for it to not have that basic function.
Also, it makes you pick your vehicle... Which is fine if your car is on the list. Mine (1990 Nissan 300ZX) wasn't on the list, so I just picked something similar.
Overall, definitely worth getting... But could use an update.