Great Location, Great rooms: Terrible Service and Poor hospitality, a real shame.
I rarely write reviews, however this trip left me wanting to cut up my accor card.
The hotel has the worst and least welcoming staff (some not all). Let me explain...
 I am a platinum card holder and subject to availability I am entitled to 9am check in and room upgrade, whilst I understand there are busy times where it is impossible it is a battle at this hotel (not the first time) to get either.
Arriving at 1:30PM I got greeted by 'check in is at 3' together with the attitude of someone irritated that I'd even try and check in before. When I explained that subject to availability I was entitled to early check in (which she should have known) the response was 'nothing will be ready until 3'. And basically told not to come back a minute before. 
Then at 3 with a queue of 10 - 15 people the rooms suddenly became available, am I to believe that all 10 rooms were being cleaned right up to 3pm and on the dot of 3 the rooms available. Of course not, there were rooms available before, but she didn't want to let me have one, to prove her power. 
Upon getting my room, I was not upgraded, which again I understand, but instead of a polite 'I am really sorry, but we are really busy and it's not been possible to upgrade you' I was told nothing. This is very standard for Sofitel, they resent upgrading you at a number of their hotels. 
They have 3 very special terrace rooms on the 24th floor which are something to behold, massive terrace with stunning views of the city. On my last day I wanted to book one (at $1500 a night) so I requested since I was leaving at 6am in the morning the next day if I could check in as early as possible, and since they said they would make every effort I agreed and paid the money.
However.. on the day of check in to that room, I was impolitely told check in was at 3 on numerous occasions. I found the previous guests had left just after 12 and that the cleaning staff were on their lunch and I would have to wait. Again and again I explained as patiently as I could the condition of booking was that I was expecting it as soon as possible, but they did not seem to care. 
In summary it is a great product poorly delivered, Accor need to think about their loyalty scheme, I personally intend to cut my card up, it has no value.