Looking for Thunderbolt 2 PCIe Expansion Chassis

I’m looking to purchase a new PCIe expansion chassis with thunderbolt 2 to use an Avid Protools HD card with my new mac pro. I saw that the Avid HD card is compatible with this chassis: http://mypccase.com/nethpcexenmo.html. Does anyone have any experience using it? Is bottlenecking an issue?