This is my seventh BMW over the years--3's, 5's, X's and Z's--and while it's still new to me, first impression is that it's the best yet! What jumps out is how amazingly quiet it is. The best part is the instant acceleration, no turbo spool-up delay, no hiccup and waiting for the car to decide if you really wanted to go after all--it just goes, no argument. And that's handy when you're trying to pull a heavy vehicle into traffic.
I've read reviews that claim the steering is numb. I don't find it so. The car is readily responsive to the wheel, but it's a heavy beast at over 4200 pounds, and high school physics tells you it's just not going to feel or act like an e36 three-series, folks. But it's still a BMW and drives like one. I will say the 530e feels far more athletic than my previous Five-series diesel at just about the same weight, but still very solid and planted at over 80 mph (not that I was going over 80, officer...).
The interior is amazing--ambient Disco lighting has come to BMW! Love it! The seats are the most comfortable I've yet had in a BMW. The touch screen is a big improvement, less fiddling with the iDrive controller. Haven't tried the Apple CarPlay yet, so can't speak to that. The standard stereo came with this particular model, and it's okay. Not great, but okay. If I'd had a choice--and I didnt--I'd go with the reasonably priced Harmon-Kardon upgrade (their top-end diamond system is likely a jaw-dropper, but for $4000, it'd better be!)
My commute is 12 miles, and so far I'm doing around 70 mpge. Can't complain about that! I do wish the batteries had more range, but we're taking baby steps into the future of all-electric cars, and it's currently a weight and trunk-space trade-off. As the technology improves, so will the range, and for now, anything that helps kick up relatively non-polluting mileage is good for everyone.
Overall, like almost everyone with a new vehicle, I'm infatuated with it, but I expect even as the newness wears off, this will turn into the BMW that will top my list of favorite cars.