I haven't used a melody library riff in an increadiblly long time, but i must have used Trancer Pad at SOME POINT in my lifetime. Probably in the pre-2007 days. Or, rather, The Exceptionally Dark Days, as i prefer to call them.
In any case, you've done some tasty work with the riff here, creating a lovely atmosphere with your own riff's, and alterations to the original. It's a calm, happy, and chilled out track.