I really like they way of working in the desing a must have mainly to the pros that travels a lots and need a tool like this one. The only think i didn't like from it is that there isn't a way to paste from a print screen so this makes the app not that much good in my case that i need to paste pics from different websites to the drawtify project.
Another thing that i don't like is when downloading it just gives you the option of 4 imag format with the low and HQ options it could have something more expecific being a pro stuff but sill ok.
If you need an app to do pro work quick and without many problems this is a one you must.