These microphones look the same as the higher priced Rode however they aren't very good. I haven't tried a rode, I'm just saying that these are cheaply made and break very easily. I'm currently having to wedge tinfoil into the battery compartment to keep the battery connected and the screw thread on the bottom has broken as it is held to the microphone with four plastic pins the thickness of a needle.
The audio quality is not fantastic. I understand that it's directional, that is why I bought it, however it doesn't really pick up what is in front of it either!
I will have to replace it at some point, and I won't be using the same make.