I've got the BJCM, I like it for its ease (I say like it, I've only wheeled it around the house and put it in and out of the boot of my car), and I've stripped it right back to the frame so I can use the bassinet and the car seat in it. I think it's when it's in full sail, with all the seats and hoods etc on it that it looks and feels HUGE.
Luckily we're 200 yards from a big Sainsburys, so my shopping type popping out isn't a long haul. The woman opposite with a now 6 week old, has barely used her pushchair - she's carried him the whole time.