I arrived @ 8:30pm and left @ 6:15am, so had little time to appreciate the hotel in any real way. The restaurant was crawling with very attentive and not terribly busy staff. The food was good and expensive, I did not even bother with wine, especially since I was dining solo. I did receive acknowledgment of my gold status on check in and a room upgrade, to a mini-suite, I think it's just a bigger room with complimentary bottled water and thick white bathrobes.
I was in transit, and the directions offered by mecabq for using the Turkish airlines bus to Taksim Sq., then a taxi to the hotel from the square worked very well. The buses run very frequently to and from the airport, at least every thirty minutes, and a Sunday evening and early Monday morning trip took ~ 35 minutes each way. The taxi fare was 7 Lira. The bus was 9 lira. I might consider another stay here, but for those traveling as a tourist, the proximity to the more popular sites of Istanbul is not great.