I can't comment on the originality of the product, but if its a copy, its reasonably convincing.
I had a full set of parts, but didn't use the supplied keyboard as two of the top buttons didn't work (** note that I did not use the matching underlay as this would have involved more complex work on the phone, hence still 5*)
I also didn't use the supplied track pad for the same reason.
Good points: Full set of parts, Look to be acceptable quality at the price point. Tools supplied
Bad points: Fiddly to install (not recommended for beginners). I had the same speaker issues and case not fitting issues reported, but this turned out to need the PCB… Read more