I drove both the 3 & 5 series - 328x is far too small inside & materials are worse than my Honda Pilot. The 5 series was a lot better, about as good as my Jetta, but no close to the quality of the Audi (which was $30000 less).
Horrendously confusing I-drive. On an angled turn onto a roadway, I could not cancel the signal without activating the opposite signal - salesperson could not get it to work right either.