Product review (1 stars): I paid to have the product installed (and I needed ...
I paid to have the product installed (and I needed to have the ceiling below opened) only to  have it removed again.  Whenever the shower or tap ran or the toilet was flushed, the drain pipes to the pan would vibrate and hum.  The plumber explained that the drain hole is too small, so the pan basically functioned as a wind instrument!  I replaced it with a pan with no drain, so I'm out the cost of installing a drain and repairing the ceiling below (over $1000).  I will have to paint four rooms downstairs at some point to get the ceiling paint to match because the downstairs is open (no walls) - that will be another expense.  Do not buy a drain pan with a small hole.