I've tested the Friendly Panels ASPEN EFD 1000 and MFD500 in Prepar3d V2.3. Performance is not very good. When I turn on the ASPEN gauges (EFD 1000 PFD, and EFD 500 MFD) the frame rate surges and dips to single digit numbers :S
I've been in touch with Friendly Panels. They told me that they haven't tested their software in Prepar3d. I am hoping the developer will be able to optimize the code for Prepar3d V2 in the next coming months.