I haven't yet, but it's next on my list to buy once I get through my existing flour.
I'm always AMAZED that people LIKE the gluten-free Bisquick. I tried the biscuits and pancakes and couldn't eat them they were so AWFUL! The pancakes tasted like white rice. There was no flavor, really. Like a watered down flavor. But I've heard so many people RAVE about those pancakes. I'm baffled. But I've also only recently been diagnosed and REMEMBER the awesomeness of the Bisquick Supreme Pancakes. And the biscuits were even WORSE. Tasted like rice and eggs. No amount of apple butter could help those things. I've completely given up on using it for baked goods. I do like the parmesan chicken recipe on the box though!
I used the Better Batter again last night for cupcakes and once again no one I served them to even suspected they were gluten free. The Pamela's pancake mix is good. It doesn't taste like traditional pancakes, but they taste good. I don't use pankcake/biscuit mixes. I just use my Better Batter and make my pancakes/waffles from scratch. They come out great. Are you sure you are measuring the flour correctly? Are you spooning and scraping rather than scooping? I'm just trying to figure out why the Better Batter isn't working for you. I use it all the time with great results.