They're old, and there are lots of things to look out for. Mostly minor but one or two bigger things. Join the Porsche owners' club and get the car checked before purchase.
And consider the area of glass to the total cockpit volume and what that might feel like on a sunny day. I advise against buying any 944/968 that doesn't have working (check it) air-con. It was the only reason I sold my 944 S2.
As an every day car, they're fine. They're Volkswagens really and the ownership experience was no different to owning a MkII Golf GTi. Just more rear-drive fun.
Honestly, though, they get hot inside.