Hi there! 
I'm sure this has said before but I didn't find anything on this in this Beta thread so I'm saying it here.
I (and many other sellers on the regular square community) would love a customer facing display for the square stand. Customers prefer to see their total as I am adding items and like to see how much each item costs and what their running total is. This is especially true when you have a sale going on as customers want to see the final price of an item before and after the discount. While I could just spin around the stand to show them at the end, customers often want to know their total or how much an item turns out to as I'm ringing them up and if they are buying several items, I don't want to keep spinning around the stand every time they ask.
I am aware that Square is testing a version of a customer display for the stand but there are a couple of issues with it:
I also don't see why the stand can't just support the square register's customer facing display.
I currently use a lightning to HDMI adapter to mirror my ipad's screen onto a customer facing monitor and although not the perfect solution, I find that it helps and customers really appreciate it. They can see their cart, item prices, discounts, tax, and total without interrupting my flow.
If square adds support for a wired customer display for the stand, I would definitely purchase the stand.
Just my two cents.
Square Community