I've been reading up on what aux in to get and i'm a bit stuck on the benefits of the xcarlink. It all looks great for iphone but it looks like it's going to be a couple of wires for android (aux and power) with control only via the phone. The sd/usb option looks ok but i don't think i'd ever keep my music up to date on it. so, the gromaudio seems have a 1 wire solution including android control from the wheel. Basically i'm swaying towards the grom but as the xcarlink seems to popular on here i'm worried i'm missing something. Any advice would be great.