The passenger window switch was the easiest thing to replace on my 1990 Convertible. I replaced mine because the original passenger side switch would only allow for the passenger window to come down, but it didn't have the power to bring the window back up. Fyi, My driver side switches worked perfect but it was annoying that my passenger didn't have the option to do so. I wasn't 100% sure that replacing the switch would be the fix to the problem, but it was worth the try for the money. It was inexpensive to check and luckily it worked. Also it was a very easy replacement. Took about 2 mins.
The armrest delete was easy to replace as well. I replaced my old grey colored (and broken) delete with a black one to match the new cupholder/usb black armrest. I did have to use crazy glue though on the delete ashtray because it fit a little lose.