A friend and an acquaintance of mine both berliners asked why I chose to stay in Neukölln if I had reasonable finances. I assume its reputation as being a heavily immigrant neighborhood along with being dangerous were their perceptions. I never once did not fell safe and I always felt like I was in a unique part of Germany/Berlin. As friends from east Berlin were indifferent to me staying there, I knew its reputation preceded it.
I enjoyed my time there. It’s located next to a bus stop that will get you around and also a short walk to train lines as well. There are good options for food and drink nearby. Andres was a nice guy that checked in on me occasionally to make sure I had everything I needed. And the FHXB museum nearby is a great way to learn about the area.