Hi Daisy, I got the red Doc bb (pm was too big for me) and I love it. I have used it as hand held while running some errands and it was very easy to access. At first I was a bit worried about the weight on the handle, but I figured that they wouldn't have put it on if it wasn't able to the job. So after I relaxed a bit I really enjoyed being out and about with it. I also have used the shoulder strap which was comfortable but a tad too long for me so I will be getting another hole added.
I did notice slight sagging at the top when hand carried but not when using the strap.