I think fudge is one of the easiest candies to make. Once I started making fudge in the microwave, I have not gone back to the other way. It seems like I tried several recipes before I found one that worked good every time. Sometimes you just never know when you are making candy. The humidity in your house can even make a difference.
The nice thing about making it in the microwave is that you don't even have to worry keeping track of the hard crack stage. You can still use a candy thermometer if you want to make sure you have the right temperature, but once you get used to your recipe, you should be able to tell by what it looks like.