I have both EQ7 and Quilt Pro, both have their ups and downs. I love both programs for different reasons and use them both all the time. The one problem I have with EQ is the fabric yardage estimates always seem to be off (not enough) and that just bugs the heck out of me when I'm in a hurry so I have learned to double check the yardage in the Quilt Pro program before buying any fabric.
I know you are thinking, did I design the quilts twice, that answer is yes. Once in each program so I can use the one that works best for the project at hand. Guess I have more time on my hands then most but it's the only way I know for sure if I have it covered.
The best thing about EQ is the design features, they are so much easier for me to use instead of the ones in Quilt Pro. I can design curved blocks faster and with less trouble.
As many here have said, there are a lot of people that have lessons on the different features of EQ and that is itself is a plus for me. But you have to take the time to learn them. Walk through the lessons one at a time until you get it before moving on to the next lesson. Reading through the books won't get you there, you have to work them through each step as you read them. This has helped me more then once.
The only thing I really wish they would do is have it so you could export the blocks from one program to use with the other. Now that would be a great idea!!!!