One huge thing I LOVE about it - is changing block sizes and all the templates, or rotary cutting measurements are automatically fixed..
you choose your block size and then your block - and can change both however you like...
you can play with colors and fabrics, it computes yardage, you can add borders or remove them, put in sashing, take it out....
and that's just the simple stuff LOL
but I do have to mention my 'pet peeve'... the 4 installation limit and the having to have internet access to install...