Aha, the "other" airport
I don't envy you the journey, unless you've got your own helicopter.
The traffic from Ataturk to Maltepe is so horrendous, I've considered using your place, but the flight timings are all to hell for me. I'd lose a day on every trip.
I've taken to using the ferry lately, it's quicker, more reliable time-wise and more pleasant than sitting in traffic.
Love Istanbul though, it's a terrific city, unbelievably diverse and so big. The best part of 20 million population in one city? Amazing.