They also released a best album. I think they did pretty well sales wise. They're probably one of the more well known arrangers on the artist-circuit so I think they're about as famous as they're going to get.
Here are some of their PVs:
the starry sky (arguably their most well known song, it was the ending theme to Angelic Layer)
http://www.youtube.com/watch?v=bUeh71p3yJo
Save Me
http://www.youtube.com/watch?v=5P031...eature=related
DECIDE (debut single)
http://www.youtube.com/watch?v=FzpDB...eature=related