I cannot comment on the ZS, but I've been renting a new(ish) HS for a month and a half so far here in Australia and I can say it's very mediocre.
It is not ergonomic or comfortable, it's loud and there's lots of sway on corners (as previously mentioned). I haven't actually measured the fuel economy, but it doesn't seem so great for such an underpowered vehicle.
As for power, I can get up to speed on the highway, but the transmission does wind out often when accelerating.
I find the console controls poorly designed and the display is slow and sluggish.
Steering radius sucks bigtime for such a small car.
The 'MG Pilot' is a total nightmare with false breaking and all kinds of unexpected surprises
The cruise control is utter crap and has a mind of it's own.
The car is loud and the aerodynamics have not been considered...
The window controls are erratic and difficult to 'crack' the window to your liking
When you are able to open the window just a bit, be prepared to not listen to music
Speaking of music, the sound system sucks
Oh, and the rear camera isn't protected well in the rain to the point of usefulness.
It might be cheap, but in my opinion cheap is all you'd get buying an MG. Caveat emptor (BTW, I wouldn't own this junk for free)