I followed the link you posted to Amazon and looked at that PDB. Will it work? I think you could make it work but I can't be sure from the discription and the photo. Here is the issue. The PXFmini gets its power from a 6 wire cable that runs from the PDB. In the Amazon ad I did not see any cable that comes with it. It probably has one (every PDB I have ever seen has one) but the ad just does not show it, or talk about it. The reason that is so important is because the cable connector on the PXFmini is a JST type. Many power cables that ship with a PDB have DF13 type connectors. So there is a VERY good possibility that the flight control power cable you get will not fit the JST connector on the PXFmini.
But all may not be lost if that happened because Erle sells an adaptor cable that will connect from a DF13 to a JST. I used a Hobby King PDB that did not have JST connectors so I had to buy that converter cable. That is how I know about this issue, I lived it.
The bottom line is this. Do you want to buy a third party PDB and an adapter cable? or just buy the Erle Robotics solution and know it will work.
Sorry this was so long winded, but I hope it helps.