Very close to Galata Tower. for airport pick up and drop off use Anemon Hotel. would have been nice to have a bottle of water available when we arrived. 3 mini markets close by and cafe downstairs for breakfast. taxi from the tram stop to the tower cost £2.50 and we'll worth it.
An Istanbul travel card and instructions would also be a nice touch. we were lucky, the cafe opposite the Boss Hotel let us use his. This made getting around Istanbul so easy.
Glad we chose to stay at the Galata Tower, over Sultanhamet District. Recommend Nardis Jazz club, 2 minute walk, food good and reasonably priced, drinks are pricey, atmosphere and music great. also recommend walking up the hill from the Tower for great shopping, bars and atmosphere. Finally, evening boat trip on the Bosphorus, dinner and live music. We booked through getyourguide, £22 each we upgraded to £30 for all inclusive local alcohol. so good we nearly booked it for the following night but we were knackered and had to pack.