Hi! I'm so glad I made your stay fun.
Sorry to hear about the other issues.
Yes the apt is located on the 5th floor of a walk up building. I hope carrying your suitcase up the 5 flights of stairs helped :).
I have curtains and not blinds on all the windows because we New Yorker's cherish any natural light we can get. We live around skyscrapers so the sun is always welcomed :).
The mattress is about 10 months old. It's actually a queen mattress with a pillow top which makes it a little larger than a queen (I have to use King sized sheets to cover it). I'm sorry it wasn't to your liking.
I am glad that my recommendations for food & nightlife did make your stay a pleasant one.
All the best!