Good stuff!
Well I just HAD to review this, I love teh feeling of floating.
In any case, the synths were pretty laid back, but not very diverse at all, and the constant panning wasn't entirely that useful, however I did find the melody work quite moving, there were some really good parts in there, some really happy, some really sad, and some darker parts.
My only qualm would be using a lower pitched synth, and perhaps a variation of them.
All in all though, good stuff! Keep them coming!