>>211425611 (OP)It's long and it's hard. A very maximalist, indulgent sequel. There's some great stuff in there and also some rough parts. If you loved the first two and can't get enough then you'll enjoy it.
Save regularly and in different slots.
You can choose which order to do certain areas in but unfortunately a design oversight means you really want to choose Nevada first. (Very mild spoiler: You lose all your weapons at some point in Nevada, and if that includes special weapons found in the other areas, then too bad- you don't get those back.) Some people are saying they fixed it in the remaster, others are saying they didn't- I wouldn't risk it.