That synth is absolutely beautiful. I don't know if you made that or used a preset of some sort but I love that sound. While I do love that synth, it's also a bit irritating to the ear a bit. Kind of lessens that soothing tone I think you were going for. Especially when that higher octave kicks in. The pitch drop is great, as are the sound effects that you use. This is a very good ambient track. One of the better ones I've heard.