I do have Sit & Go Wizard, but honestly I never use it. What do you want the software for? If you are looking for a program that you can go back and insert your hands to see whether you should of pushed/folded than SAG Wizard will probably be what you are looking for.
If you are just looking for something to help you improve you SAG game, you can either (1) read a (good) book or (2) watch some of the training videos. Obviously doing both would be best. And when looking for a book to read, you have to get good ones, because there are tons out there that are useless. The videos can help, both really are aimed at people that are newer to SAGs. Once you get used to them (MTTs as well), you kind of just know what to do. It may take awhile to get into your routine and to figure out your whole strategy, but when you do it will all come naturally. You wont have to even stop and think about it, you will just know what to do in each situation and make your decisions automatically.