I stayed at the Berr Hotel as part of an Anzac Day Tour. I can't make up my mind about the Berr - on the one hand there were things to complain about, but on the other, if I went back to Istanbul I'd probably stay there again. Maybe it's a case of "better the devil you know", or the memory of a fantastic tour making me look at the Berr through rose-tinted glasses - who knows?
Location: it is about a 20-minute walk from the main attractions - but, what a walk! If you love classy little fashion boutiques (or McDonalds!), you will be in your element. There are also two good supermarkets nearby.
Staff: Ranged from one extreme to the other. Some were uber-surly,as others have commented. Yet I spent half an hour talking to one of the reception guys about his trip to England, and he let me use most of his roll of sticky tape to attach stamps to my postcards. (Note to self: take glue on next trip to Turkey - stamps there aren't sticky!) Anyone I asked for directions was always helpful.
Cleanliness: Same here. I booked an extra night before the tour, so I had to change rooms. The first room was spotless; in the second we found a boiled sweet and a tissue between the beds. Eeuw!
Food: The breakfast room was nice - on the top floor to catch the sun - and a relaxing place to linger. The buffet was varied and generous. One of my better hotel breakfasting experiences. But also one of the weirdest - when I took a helping of what looked like egg mayonnaise with green peppers and paprika. It crunched under the spoon. 'Hmmm', I thought, 'is that crunchy peppers or eggshell?' No, it was worse - it was ice. It hadn't been defrosted! (Although, having a cast iron stomach, I did try some the next day when it was thawed, with no ill effects.)
Price: My second room was included in the tour price. I forget what I paid for the extra night pre-tour, but it was quite reasonable. The room was enormous, and the public areas of the Berr are quite posh. I felt like I had been given a free upgrade!
So, I guess staying at the Berr can be a very good or a very bad experience, depending on your luck, or who is on duty that day, etc.
However, if you stay there on a bad day, I would recommend that you speak to the manager. He seemed quite proactive. We had a problem on the last night, when the doorman sent us to the restaurant across the road - "very good, very cheap". Indeed it did look like a homespun place where local bluecollar guys were enjoying the football, but turned out to be the biggest clip joint east of Soho. After a huge argument over the bill, our group paid what we though was reasonable (by London standards, still way over the odds for Istanbul), and crossed back over to the Berr - with an angry waiter in tow. He was soon sent packing by the Berr's manager, once we explained the situation. The manager said we shouldn't have paid anything, but should have gone straight to him, and he would have told us the correct price to pay. When we pointed out that his own employee had sent us there in the first place, he said he couldn't know what his staff were up to if nobody bothered to tell him. Fair comment!
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC.