Apparently, most of the reviews of the S9+ variant have been positive. At least the protector had the most positive reviews out of any other. I'll let you know whatever the case is.Let us know how the installation goes. Can't justify $50 for a screen protector when I'm terrible at installing them and the protector has mixed reviews even for people who got the installation right.
I've been using the phone without a screen protector all this time, and except for one really weird looking scratch which showed up on the first day, it's been holding up quite well, the screen still looks great.