* "6 free sessions left" might not be enough for me to make sure that the music doesn't engage my creative hemisphere too much (I see this problem with most musical content),
* the pricing is fairly high. I'm in Poland and I pay $5 a month for Spotify, this is what you are compared to. I'm not saying it's impossible, but I need a fairly good justification to pay you $7/month just for ambient work music.
* I could not find out if there is an iPhone app. There seems to be, but I can't find it in the app store, and can't find mention of it on the web. This is important, I often work out of cafes, and I need a phone app with offline capability.
Just for the reference, on my phone you'd be competing with Naturespace, where I bought lots of tracks and which serves my needs for muting out the world around me.