These cars have absolutely fantastic suspensions when they are functioning properly; they were years and years ahead of their time (zero offset front ends, anti-squat rear, etc).
On the downside, they are "sealed" units (i.e. no zirc fittings), so maintenance is impossible. If you buy a car third or fourth hand, you might well end up w/ a suspension that is in dire need of maintenance, as these owners couldn't afford - or didn't want to be bothered - with expensive work that is non-essential to being able to drive the car. I myself was fortunate to buy a one-owner car which had very recently had the front end rebuilt (to the tune of about 3 grand). It's so nice.
These cars will go on and on, even if they have been neglected. They were well built. But if you are only having "concerns" when a good gust of wind hits you sideways, I'd say your car is quite all right.