It's not a bad medium, currently maybe my favorite. It's ez to adjust and erase which is nice. For years the only art I did was the GC and it gave me bad habits. I haven't used guides for a long time because you can't waste objects (in the original gc you only had a hundred something) Guides especially for faces has always helped me with scaling.
I used a stylus for these, it does a better job with pinpointing where your drawing. A finger is so wide you never know where it will mark. There is limitations on a phone though, you are limited to pin stroke. The face of the guy on the car would of been better on a iPad. His eyes were almost impossible to get any better even zoomed in all of the way.
Thanks for the kind words. I wish I had more time because there are changes I would like to address. Stuff that isn't as obvious til you print it so big