Although looking like the eachine and sharing the same specs, these are not similar. The reception frame rate isn't great but to be expected at this price point, the image is clear and the fov excellent. With being box goggles they are not very comfortable as all the weight is at the front. The main 2 reasons for the 1 star review are.
It is not true diversity the product hardware only features 1 receiver. This is not a massive problem but is not as advertised.
But the main killer is the latency. The latency on my set was 120ms. For fpv this is near impossible to fly with any degree of confidence or accuracy. My vr006 goggles only have 32ms for comparison. Unfortunately all these goggles are good for are to pass to the kids at the club to have a watch.