I love my Wacom... not familiar with the "D&B", but any tablet/stylus type tool should be a huge help. As far as the image. Honestly, I'm not all that fussed. Bear in mind, I'm looking at this in comparison to your other, recent work. As just an image, it's fine. Well exposed, lovely expression, but as part of your body of work, it's lacking.
The specular highlight along her left leg immediately grabs the eye and pulls it down from her face, and that, combine with the linear elements of the wall upon which she is sitting for a leading line which take the viewer's eye right out of the image. On a more personal note, I'm not fond of her lower legs and feet almost projecting out of the image; while they should form a line taking you up the torso to her face, but the exposure differential defeats that. Lastly, her pose, almost leaning over the edge, creates (IMO) strong, displeasing visual tension. (Oh, and make the bra straps go away; there's a reason they're called UNDERwear).