TLDR; the hotel is hotter than hell. You booked air conditioning, right? Well, actually … wrong. They turned it to hot air mode, won’t tell you that, and you’ll be unable to sleep as temperatures resemble the Sahara. There is also the fire station next door which they won’t advise you on either. Sirens ALL night long. Don’t think you can open the window to cool down - you can’t. The noise will give you tinnitus! The management or lack thereof are a disgrace. Stay here at your peril. Fuller review: I booked two rooms for six nights at almost 2000 euros. Our party were unable to sleep due to the extreme heat and had to leave early on day two, but not before giving the hotel four opportunities to put things right. We are reasonable people. The hotel, not so much. We booked Sana Berlin as the hotel is advertised as having air conditioning. This was false advertising as management had decided a few days earlier to switch off the a/c with no notice to guests, and were unwilling to switch it on, despite me asking on three occasions to reverse or rectify the issue. Not having this facility made the room incredibly warm, and sleeping at night impossible. Did I mention you can’t open the windows? The hotel refuses to concede this as an issue, despite their own member of staff visiting our room, agreeing it to not be acceptable and visibly sweating and uncomfortable due to the heat. This was the same member of staff who advised he lives in the hotel and can’t open windows either owing to the fire station next door and extreme noise of the sirens… so, not just us then. Notwithstanding this, the hotel still doesn’t take responsibility or rectify this, and has charged me handsomely for two nights accommodation (663 euros). Disgusted yet? You should be. However as with any horror story, it gets worse… I may have mentioned that we did not sleep for two nights, how could we? The extreme heat combined with the loud emergency vehicles… it felt we were in a warzone, not on a holiday. Ah, the windows. Firstly, you can’t open them to cool unable the room down due to the noise. Even if you did, you’ll get no privacy as you can’t shut the badly positioned electric blinds and have the window open at the same time… so yes, if you do you’ll be in full view of the street. Nice if you’re an exhibitionist. I’m sure you’re beginning to get the idea now. So, what did we as guests do about it? Well reader, we tried! Lord knows we tried; Both my husband and I tried to address matters with the hotel to provide fair opportunity to resolve the matter. After the first night I emailed at 8am the following day, to outline the issues. The hotel did reply at 10am advising this (the a/c) would get looked at by the ‘technical team’ however after this did not provide any further updates and proceeded to ignore us. Cool… or not as it happens! I sent a further email at 15:20 the same day seeking an update before we returned to the room. This was of course ignored, sigh. On