The location is amazing (especially for that price) — everything you want to see and try in Wellington is literally a stone throw away! I was surprised that we didn't hear any noise from the street, considering that the apartment is located in one of the liveliest streets in Wellington. Wa was very nice and friendly and explained us everything about the building and the apartment.
However, the night that I spent there was terrible and basically didn't have any sleep. Our room had a shared wall with the room next to it, and the noise insulation between this two rooms was basically non-existent, it felt like we were sharing the room with the guy next door. First, we heard all his phone conversations (luckily in the language that we couldn't understand), and later that night he started snoring veeeeeery loudly, it was practically impossible to sleep. We tried to knock on the wall so he wakes up and maybe turns on another back and stops snoring, and after a few hours of struggling I went upstairs and had a couple of hours of sleep on the sofa (on the second level of apartment you could still hear him, but barely).
Perhaps we were just unlucky with the neighbor because I've never heard that terrible snoring in my life, ever.
I would recommend you have earplugs with you and check whether the room next to you is booked for the date before confirming your booking.