It's not really a 'monstrosity', which to me is akin to something very large. Looks more like an economy car to me.
I wonder how they perform in crashes though.
I have often wondered why this question gets asked. From where I sit, the safest crash to be in is the one you never were in. I put more value on accident avoidance than what happens if I get hit by a train. I have made use of that criteria for every car I have ever owned. In 40 years of driving, it has served me well.
The one serious accident I have been involved in would not have happened had I been in a smaller, better handling car. It happened in my parents 69 Ford LTD.
The Coopers handling prowess allows a person to get out of the way of trouble before it happens. ALl you have to do is pay attention to your surroundings. I suppose driving a motorcycle for 25 years also contributes to my awareness of surroundings.
I will also say, the Cooper is not for everyone. It is more sporty car. Pedals are set for wonderful heel and toe action. The dead pedal is where it should be as well. The seats are firm and the bolsters are functional. They hold you in place really well (avoiding the leather clad option helps). I would imagine heavier folks would be very uncomfortable in the car due to the seats sportier design. The interior design is quirky, to say the least. The large center mounted speedometer is a bit garrish.
The base car hints at its heritage. 6 way adjustable seats, that grip, and tilt/telescoping steering wheel with the heel and toe pedal placements says "drive me, drive me hard". It is difficult not to have fun driving this car.