Dresses from Macy's!

I ordered a couple dresses from Macy's last week.  They have some pretty good sales.  I received my package, and I am in love with one and undecided about the other.

First, the one I love is the Guess Sleeveless Scoop Neck Striped Dress in black:

So the fit is rather casual but the color/pattern kind of dresses it up.  Here it is on me:

The dress that I'm unsure about is the Bar III Sleeveless Scoop Neck Striped Cutout A Line Maxi:

 

The length is actually good for me with my 4 inch heels on.  I got this in size small:

Side zipper here, but you really don't need it...

I am just unsure about that side cutout hole.  What do you think?  Too much skin?