Mayflash F500 V2 - any input lag?

[Lazy-Assed Prophet]

I bout a mayflash because I heard it was modifiable, and it is. I've been having fun putting in different joysticks and buttons, testing out which is better, the only concern I have is the input lag. I have no equipment to test input lag but people on the internet seem to be bi-polar when it comes to mayflash having any input lag, I was wondering if this forum has any answers to my concerns. Thank You.