I use RainX and it works great.
I find RainX to cut the life of my wiper blades in half. Chemical reaction....I don't know.
I am trying Aquapel on the next warm day.
I too had to have my windshield replaced two years ago. The replacement was Pilkington, and no problems whatsoever.
steviej
I've been using Aquapel for about 3 years now and I think it's the greatest thing since whatever. You really notice it when you get up to above 40-50 MPH. I've been through some heavy storms where people were pulling off the road and stopping, and I could still see ok to drive.