Fabulous! Best of breed for creating ambiance that I've heard and the suggestions here are bound to improve it.
It works from Firefox browser on a phone (sliders don't function with Chrome and it fades out immediately on Dolphin and Android browsers.) An equalizer (even Baxendahl 2 knob tone control) would be cool but would probably be a drag on the server.
FWIW regarding sleeping to ambient sound, I have an extensive collection of 'phones and 'buds of all types for R&D purposes and the hands down winner for 'buds to sleep with is the Sennheiser CX200.
(Irrelevant aside: For $19 at Amazon they are also by far the best bargain I've encountered for pristine sound.)