NZFF

This is an old favourite, so updating for US$12 was a no-brainer for me. Once again I need to spend the time setting it up for the aircraft I fly, but I know from experience that it is worth the trouble.
Purchasing the upgrade went without a hitch, although you do need to make sure that you read everything and understand the process. Having easy access to your Flight1 orders/passwords etc helps:)
Details on SimForums.

It would be interesting to see a comparison of this with Chase plane.
Although you can't really go wrong at $12. It certainly has some cool features.

Yeah, I'm awaiting the completed Chaseplane, just to see how it works for me, but since I used to use EzD all the time in FSX, I've been keen to have it back in for Prepar3d.
However at the moment I've had to disable it, as I am getting the odd crash on start-up -- GPU hanging -- which I've never seen before. I might wait for the finished release for that as well.