It is awesome! Great blur, perfect for portraits.
The first two were just test shots as I literally got the 16-35mm and flash today. I have an umbrella to diffuse with it but it's pretty windy here today and it kept flying away so I went without LOL. I kind of like the wonky effect high contrast and wide angles give, but the second photo in particular is overly bright and would have benefited from the umbrella being up. I've never studied photography professionally or used off camera flash/wide angle lenses so I'm pretty excited to play with them more!