it's a pain tool better then paint but it has layers [i hate layers lol] i'll show you what i've been working on, when it's finished ^^
layers... oh I remember dealing with those in photoshop I could never remember what layer I was on.
I JUST DELETED THE ONE I WAS WORKING ON!
Ohno there's no undo or fixit thing??
First of all congratulations on getting SAI!!! (I'm using it as well and god it's like heaven ♥)
Layers are actually pretty good! To prevent on deleting them you should probably name each layer (I did the same mistake many times over and know how you feel v.v"wink xD And also, with layers you can at least do a lineart without having to draw into it everytime - unless you're not using lineart, then you've got my respect!