I love your characters. The playfulness of light and their head to body ratios are really adorable and endearing. I have an older surface 3. I mostly use it for sketching and such, as it isn't as multilayered in brush sensitivity as my wacom. It is a joy though to pop it in a bag and have your studio at the local coffee shop.
Again, great character studies and the finished piece is great. I really like her hair!
Thanks a lot, Donna! Surface Pro 4 and it's pen greatly improved in comparance to Surface Pro 3 as I know... At the same time if you will think on upgrade don't buy Surface Pro 5 (2017) because there is a big problem with the pen there. It's jumping and you can not draw at all there.