Carnegie Math

I'm a 6th grade math teacher- we are starting to use Carnegie Learning in our district this year.  I had a week long training, but wanted to know if anyone out there had thoughts to share about the series and how they used it in their classroom.  How did you implement the software with the text/how many days did you use the software?  What days of the week worked with the software?  Was it easy to break the kids up in groups and transition to more of a facilitative role?  Any feedback would be appreciated!  Thanks!