I don't do much mixing but believe it or not I've tried all the amp modelers out there and EZ Mix 2 is my favorite. I bought this bundle so I could select all the packs devoted to guitar sounds. I grabbed the bass one as well. You can choose whichever six you need. It costs way less than buying them one by one, so value for money is huge on this. It's perfect for people who love EZ Mix 2 and want to expand it significantly for a fraction of the price.