Shrink of BW datafiles - experience & recommendation

Hello,

We have completed compression of our BW production database . (SQL2008 R2  /  BI 7)

BEFORE  compression - The 3 database files were 351GB each and 286GB of it used in each file

AFTER compresssion -   The 3 database files were 351GB each and  70GB of it used in each file

From your experience / Knowledge will SHRINK of the datafiles to 100GB each cause performance / other problems because it's a BW system.

Thanks for your help,

Moshe Yerushalmy