Comparing to BlueArc, how does the GPFS storage does for you?

The user sace (scratch, PWG, etc ...) were moved several month ago from a BlueArc appliance storage to a GPFS appliance. We would like to poll you for your feel on both stability and performance of the new (GPFS) storage as a comparison to the previous (BlueArc) solution.
Please, chose two answer: one answer in each of the performance and stability category.