Sorry for not posting my review... in summary I was disappointed. After all the ooohhhh and aaaaahs in this thread I probably had high expectations.

Its a decent boutique style chain hotel. The area its located in is one of the better parts of town, so everything is as clean and orderly as you would expect of any southern european city. You have to take a taxi to go anywhere, carry the address of the hotel and the turkish driving direction posted up thread with you at all times. I would say 8 of 11 taxi drivers knew where it was and what it was instantly. I mention 'what it was' because often it was an inspiration for 3-4 of them to start the 'very bad traffic, need to take a different route, fixed price 30 Lira, ok?' scam on us. This was especially bad at Taksim square, but only with the taxis standing around, the taxi at the taxi stand took us there without batting an eyelid.

I made the mistake of booking a single room online, which I then upgraded with a suite upgrade by contacting the Hyatt via the website. A few days before I noticed the original booking was for one adult, so I sent a mail to the hotel asking if this was OK. No response. I know they monitor that email ID because I used it to send a BP pdf to them the evening before departure for printing.

So we arrive (by taxi, just 45 TL from IST) around 3 pm and the reception says the room isn't ready yet. Ok, I ask, when will it be?
Don't know, maybe 1 hour, maybe 90 minutes... you are upgraded to a suite, so I can't give you another room.
Ok, what would you recommend I do now?
Sir, please go to the terrace or to the lounge, and have a drink on us.

So we (me, the mrs and two energy filled boys) go up to the pool side terrrace, everything shut down and covered up. So down we go to the lounge/breakfast nook. Also closed. Upon enquiry at the reception with the same guy, 'oh sorry, terrace is closed today because of rain and lounge is not open in the afternoon'
Anyway so we take a walk of the area and come back after nearly one hour. New person at the reception, know nothing of our hold, and look at me funny before starting to process the checkin, which takes ages... druing which she gets very concerned and calls a backoffice supervisor. After quite a bit of back and forth and tapping away at the keyboard (including the sup taping in some codes) I am told that I made a booking for 1 adult and they would have to charge me extra. I say sure, how much? 30€ extra per Person
Anyways, I agreed and she then announced me a total that was clearly wrong but much lower, in fact only 10€ more than the rate I had booked. I say OK, and they prepare the papers.

The suite upgrade was in a park suite, which was OK for us, because it meant two clear separated rooms. It seems the spa suite is the same total size as the park suite, but the larger bathroom means the 'living room' is reduced in size. The view for most of the rooms is basically the building across the street, they only have a very small number that have any kind of 'view' to speak of. Yes, the coffee maker is a Nespresso.

At checkin I didn't have our passport with me, since the (locked) handluggage was with the bellhop. I promised to bring it to them later, which I forgot and was called around 9pm by the frontdesk to be told in not so many words: 'bring it down now!' The reception guy later apologised to me for the tone, 'its a legal requirement, you know, and before we close the shift all needs to be in order'. Which I used as an opportunity to quiz him a bit about Diamond privileges and suite sizes etc while I waited to get the passports back. It seems that the park and spa suite are normal upgrades given to diamonds, if available at the time of checkin, the supervisor sometimes checks if diamonds are coming and assigns them in advance, which is why he thought I had received a complimentary and not (previously) confirmed upgrade to a suite.

The rooms was nice, not 'wow!', but nice. The TVs were hopeless, nice screen and everything, but the content was badly tuned sat tv with hazy pictures and bad sound. We watched the eurovision song contest on the local turkish, the spanish and the italian channels, and none had a good picture or sound, so much so that my wife went to bed early and missed her country (sweden) win it. I had bought along some DVDs for the kids, but in three days couldn't get the attached player in both TVs to play either a DVD or a CD.

The room looked like it had been mistreated by a previous occupant and restored again. The morning of our departure we were puzzled by a smoke smell and discovered a hinged ceiling panel had popped open. We duly reported it before breakfast to the reception but by the time we departed around 2pm later in the day no one had done anything.

Breakfast is in a nook in the lobby and nice. The selection of the buffet is very good, with a lot of local things offered, which certainly is a nice touch. The egg dishes available to order from the menu are also very nice. The place is somewhat badly designed and confusing to the guests, but you get used to it after the first day. With a 90 room property, the space available to dine is faaar to small, so expect longer waits for space to free up if you show up 90-60 mins before closing.

The pool is nice, but tiny. No one really cared to clean up the deck chairs, when we showed up for a swim the place was littered with empty glasses and used towels. I couldn't find any fresh towels so I asked the attendant at the terrace bar beside the pool, who insisted that towels were available. He called for fresh ones after I insisted, which appeared quickly while we were changing. re: changing there are no changing rooms/spaces available, the rooms that were probably designed for it are being used as storage area, so you have to change in the stalls of the bathroom behind the pool.

that concludes part 1. More later, need to go.