practicality of lululemon as diaper bag?

LCLaw3

So I really love this lululemon bag that they came out with (bliss bag).  I really love the rose quartz color, but they only sell the black in the US for now and with one month to go, I dont know if I want to make the three hour round trip to Canada to buy it if I'm never going to use it.  It barely has any reviews since its new, and of course none of them talk about using it as a diaper bag... 

so...I was wondering what the practicality of a lulu bag in general was for a diaper bag?  Has anyone used a lululemon bag or similar type "duffel" or workout bag as a diaper bag and it worked well...?  Any thoughts?