electronic boost controller need gauge?

i was looking at a greddy electronic boost controller and it says that it will measure boost, so j/w do i need a boost gauge if this will read it for me?

which boost controller are you looking at?? greddy makes a number of different electronic boost controllers.

I personally like to have my gauge, it just seems easyer to read then digital numbers. And a gauge is just a quick glance and you know what your boost is. I hardly look at the digital numbers on my blitz boost controler. I just look at what my peak boost was after running it hard.