ABT False Bottom w/ stainless elbow

Thinking about buying this (ABT False Bottom w/ stainless elbow http://www.northernbrewer.com/shop/abt- … elbow.html ) to install in my boil kettle. I’d like to be able to add whole hops to my boil without using muslin bags. Does anyone have any experience using this product in this manner? Did the hops stay above the stainless mesh. Did it affect the flow of the wort post-boil?