The first generation of Saturns had poorly manufactured seats.
Seems to be more prevalent in the SCs but I've seen it in SLs too.
Just sitting in the seat and it reclines suddenly laying you flat on your back.
Had it happen in one SC2 that also had a broken weld or something and got a metal bar jammed into my kidney area. That was unpleasant.
Not only does the recliner not catch properly or fail suddenly, the seat tracks were underengineered and will cease to operate jamming the seat permanently where it sits. No problem if it is just one person driving the car but when the car is shared....
As far as interior space? I dated a girl with an SC when I had my Suzuki Swift. Honestly the little Scud-zuki had more headroom than the SC, felt like as much legroom in the front, and the back seat...well, neither one was good but I give the smallest advantage to the Swift again. Trunk space with back seats up, power, ride comfort...etc... the Saturn wins hands down but it's sad that the tiny "Geo Metro +1 cylinder" felt roomier in the front.
Can't beat the plastic panels for durability. Sure, a large enough impact will crack and break it, but an impact that large would have obliterated and creased a metal panel.
The factory stereo in the upper level Saturn S-series was remarkably good for an affordable car OE stereo.
The alternator was badly located. I can swap a 4 cyl Cavalier or 3.1 OHV W-chassis alternator in minutes. The S-series is not as bad as a DOHC Z34 Lumina alternator, but it's not much better
As far as the powertrain? Well cared for the S-series will live a long and economical life. Neglect it and it will be a smoke monster that tosses it's timing chain prematurely