no... you notice it, but it's not bad... especially to those used to working around aquariums. Non-fish people may notice it more.
I recently cured 350lbs of the stuff in 3 huge stock tanks in a back bedroom of my house, and for the first week or so, you smelled it down on that side of the house, but it honestly kind of reminded me of the ocean... almost pleasant.
Of course my sister came for a visit and asked what the "stench" was.
I guess the world don't move to the beat of just one drum. What might be right for you, might not be right for some...
... of course, there's always air fresheners.