Yes of course ^^ in my opinion it is better than Phostoshop. SAI has soft brushes and an awesome blur tool. I used Gimp (something similar with Photoshop) and tried the photoshop too but for anime style the Paint tool SAI is the best ^^. Lot of artist on devinatart use it ^^ I can't send the SAI's full version download link (deviantart terms, copyright etc. doesen't allow that) but easy to find it with google ^^ .