Black Rock resident who commutes to Greenwich here. I love my neighborhood. It’s very walkable and I generally feel safe (single female). During the summer, it’s great to walk down by the water, or visit the farmers market. Just be aware of your surroundings, which is true to any location. You won’t have the same vibe or nightlife as Stamford, it’s a bit more relaxed and low key up here. But there are great restaurants and Fairfield is 5 min away if you want a downtown feel. Your commute will be much longer than 30 min. That 30 min is with zero traffic. Train or driving, you’re going to need to budget an hour at least.