I picked this up since I could pop that in, power the transmitter with USB.
All the reviews are tainted with folk that, well I apologize, are expecting more than the product can deliver. That is I see folk read "good for 20 feet" then they stick a wall and hope it will go 40 feet. That will result in a bad review.
I'm guessing here you want that iPad screen over WiFi solution. Maybe that's out there.