Two points: 1) Some reviews complain about a sticker that says this sticker should be removed. no Below the sticker is a sticker that says "Remove the protective film from the reflectors". See fig. The protective film must be removed from both reflectors. It is easily removed by simply working your fingernail along the edges of the reflectors. I can see how this can confuse some people because the screen protector isn't that thick. 2) This signal booster works surprisingly well. Once you've reached the limits of its range, practice aiming the controller directly at the aircraft. Those who claim that this signal booster doesn't work are likely: a) unable to wield their controllers, which may not be for beginners, or b) didn't remove the protective film as described in 1). I tested this with the default remote paired with the Mavic 2 Pro.
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