Any advise, I have seat 20K, 16A shows as open, is this to close to the bathroom or OK to take?
It will be hard to tell, because outside of the seat map, doubt that anyone has seen what the cabin actually looks like. On the regular A359, row 16 should be fine, but on the ULR, the seat map shows row 16 as the last row before the bathroom. In my experience, the last row should be avoided. There is a row 17 which only has center seats, but I wouldn't take a chance with 16A.
I have selected 20A on my upcoming trip as well.