I got my 2016 GLA45 a few months back, and I would buy it again. This is my first Mercedes, and perhaps that makes my opinion different. Some owners may have owned other MB vehicles beforehand, and other classes may have more of the luxurious bells and whistles, but as a first-time MB owner, I'm super happy with my vehicle. It's stylish, unique enough to get a lot of head turns, and it's AMG. I can't speak on behalf of 250 owners, but I'd get another 45... I may end up doing it in a few years if the newer models are improved/changed enough.
The QX30 does look nice, but I haven't been in one, personally, so I can't compare. Does it have more of the luxurious bells and whistles? Still, as an MB owner, it would take an exceptional vehicle to convince me to switch brands.
2016 GLA45 | Bay Area, CA (USA) __🚗 💨💨💨 ___
Night Black, Black Leather Interior, Carbon Fiber Trim
Black 20" Wheels, Red Calipers, Performance Seats + Exhaust
Premium + Interior + Multimedia Packages... and more