Whilst I have no wish to argue with ivornomates. The plane that I flew in was a B777 which had no first class and 15a was the third row on the left in business class in the front of 2 cabins. The seat had no problems and was quiet.
Glad to hear that you have had no problems with the showers. I did in that the water was cold which I reported and receieved a fulsome apology.