OMG! I actually have that brush pen. And...... I ABSOLUTELY HATE IT!!! But then again, I am proficient in using my finger. I felt that the brush just doesn't give me the same flow and control that I can get with my finger. It could be the programs I use, maybe it's the brush... honestly I couldn't tell you. All I know is that I personally hate it.
However, I have a friend who is using hers like it was second nature. She is using an iPad air (1) 16G. She says it looks and feels awesome. She talked me into buying the brush. Her work is lovely! I have no clue how she does it.
For my big girl computer work: I have a Cintiq Wacom First edition.... I love it!!! It is my baby!!!!!!!!! artinthegarage.deviantart.com/…
was created using that particular model.
The Intuos Medium Tablet is great too. It takes time to learn the control but eventually your muscles give in and conform to your actions. When I am learning something new, I draw the same image over and over again. Case in point, this lovely image: artinthegarage.deviantart.com/…
in my post you can see all the early attempts I made redrawing the same image over and over again.
Now I mostly just use my ipad Air 2 64G. (And my finger) I have great control, great apps and I am more mobil than ever!
I know that the itous creative stylus for tablets can be used for non ipad products. I am having issues with it because of the palm recognition support that was "supposed" be integrated into the apps I already have... except it turns out the apps never upgraded. Back to the finger I went.
It all comes down to what you like to do how you want to have fun doing it.