Biggest mistake I ever made
I got one installed as I thought that it might show whether or not I was generating or consuming electricity as we have solar panels on the roof. Nope, it still showed generation as the same as consumption so if the meter shows 500W I don't know if that is used or generated. Oh and when we switched suppliers it reverted back to being a normal dumb meter.
Don't do it even if the shiny shiny tech draws you in.