Other reviews note that a small road separates this hotel from a major rail line. That's true. However, I just didn't find this a problem despite having a room on the second floor, "rail side" of the building. In my case, it helped that the weather was not hot and so I closed the window while sleeping. With an open window, you'll get an education in German train engine noises every 30 minutes or so at night as I did while using the Internet before going to bed. (There's no A/C; the window has a thoughtful notice about its noise insulation rating.) BTW, vibration is not an issue.
Now for the "positives". Attentive, very smart staff. Free Internet, free parking. Clean rooms. Indeed, the room had a fridge, small kitchen and stocked mini-bar.
Before my arrival, I notified staff that I may arrive after 11 pm and they explained the procedure - but then they were there when I arrived at 11:15 pm. Parking is free but full if you arrive late. Local street parking is available, staff will direct you.
Solingen is not Paris so it would be more accurate to say that the hotel is in a "suburban" location surrounded by low-rise apartments and, I gather, a train station. I think that you could easily get to it by taxi or public transport. I used a GPS.
Would I stay again? Absolutely - if only to ride the curious all-glass elevator.
