Ok...so I'm a girl and I drive my BRZ as a DD (but winter stored). My car is also lowered. I see where she is coming from with the ease of getting in and out...but its a small price to pay for a sexy car!
I have driven my car in heels and a dress/skirt with no major issues....I just take my time getting in and out. I think a previous poster had mentioned about being able to open the door all the way....this makes a huge difference. I don't tend to park near other people so this is never an issue for me.
I've even had my 93 yr old grandma go for a ride in my car!! I had to help her out but she managed!
I've never had anyone in the back seat - no kids and no plans for kids. And we do have the option of other vehicles to drive if we are taking other people along.
We test drove the genesis when it first came out and the BRZ/FRS is a thousand times nicer!
There may be more room in the back seat of the genesis...but I'm 5'3" and it wasn't comfortable for me back there.