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I've owned the first version of actiontec's WiDi receiver and loved it. This one is just as good, it is seamless, almost real time with excellent latency, and reasonably priced. I am only giving it 4 stars because I bought a "used... like new" Amazon fulfilled purchase, it was only $4 less than "new." When it arrived it was used but like new, but the HDMI extension and the USB wall plug were both missing. I called Amazon and they issued me a refund of $12, enough to purchase both so ended up with what I needed, just lost some time getting the missing items.
Excellent picture quality, like being directly connected. Low lag, even acceptable for casual gaming. Transmits at about 25 frames per second at 1920x1080. Boots quickly. I get the impression that this is more of a hardware-based unit, as opposed to the other $25 Miracast dongles which seem to be Android-based internally. Problems are that this unit heats up more than you'd expect for something so small, and that it seems to be fatally sensitive to a bad HDMI input or a poor USB power port. My first unit was destroyed by either a faulty HDMI to Composite adapter or a poor quality USB power port. I feel that it should be more robust than to be damaged so easily. My first unit came with a USB power plug and a 10" HDMI extension, but my second one did not. The retail box is nicely designed and presentable. Used with Samsung Galaxy S7 with Samsung's built-in Miracast connectivity (SmartThings).