John,
I have done the I 88 leg from I81 to Schenectady to tie into I87 going north and it was a good road. I think most of these NY interstates are quite decent. You may come to some stretches where you have concrete wear with the rhythmic up and down dips near the segment cracks. They have fixed a lot of that over the years. Compared to western mountains, the climbs and curves are fairly benign so on that account I would not worry too much. John, I think you will find these roads to be just fine for the most part.
Later Ed