I thought the remake was a solid movie with excellent action sequences that managed to be more than just something you'd see in every other movie. I do wish they had gone to Mars, though
I kinda regret watching the original the night before because the first 2/3 or so of the movie was a pretty step-by-step remake.
Speaking of the original, that really holds up well. It still looks pretty good effects wise, even though it's all clearly shot on sound stage, that kind of makes sense since Mars is underground tunnels. And there's just so many iconic scenes in it! It's probably my favorite Ahnuld non-Terminator movie.