Recently I have had the pleasure to use PernixData but I did come across a bit of a ‘gotcha’ after uninstalling it from my hosts.
If like me you use iSCSI then you will likely spend a bit of time setting up your Path Selection Polices to suit your specific needs, so it was interesting to note the following.
When you do uninstall and remove PernixData from your hosts your Path Selection Polices do not revert back to your original configuration rather they revert back to the default vSphere setting of MRU (Most recently used).
This is worth noting as this is not mentioned in the documentation PernixData provide.
UPDATE - After being contacted by the guys at PernixData I can confirm they will be updating their documentation shortly to reflect this outcome.