Wizard has blocks that you choose from, you do not design yourself.
It is cheap, only 29 bucks.
I use it to size blocks to the size I want and to see what different blocks look like togather.
It is easy to use and you can download a new quilt pattern each month from thier website. You can play with color too. Make different kinds of borders.
Print out patterns for piecework or for paper piecing.
Turn blocks in different directions.
It is a useful tool but it has a limited amount of blocks, they say 200 but I dont think there are that many.