The first Jurassic Park movie is all time one of the greatest films ever made with the special effects still holding up to this day. The 2nd film was still very enjoyable in my opinion but it was just a cookie cutter sequel not bad, not good. The 3rd film wasn’t great at all. But compared to the rest of the series the 3rd film is basically the godfather.
As another personal pick the 1st blade movie is a hood classic good. The other 2 not so much.
It being filmed together is it being a 6+ hour movie in 3 chapters. I think it’s a single project not successive films. Just how I frame it, I concede to technicalities if you must
I watched them back to back once and can confirm. They work perfectly as a single long movie.