Seat selection in Y

[aushades]

Apologies if this has already been asked before, what are people's opinions on how close is too close to the middle lavatory when sitting in Y?

I'm booked on a SIN-MEL flight and the most forward seat in the A350-900 is row 51, which is 4 rows in front of the mid-cabin lavatory. Would that be too close to the lavatory traffic wise?

Thanks!