As a busy adult, after taking a few years off from being a high operatic soprano opera singer, my voice was so weak and thin. I had no range or projection. Then I got a BetterVoice. I practiced every morning with the BetterVoice for almost two weeks, working with my voice teacher once a week. I got my high soprano range back, I got volume and projection, with no damage to my voice! I recommend this for singers, public speakers, and anyone who uses their voice a lot, for optimum vocal health. I already bought one for my friend who’s a lawyer to help smooth the cracks in his voice and smooth his vocal fry. It’s also great for stress relief. The adjustable back-pressure is amazing. With portable design, neck strap, and carrying case it’s great on the go. I’m recommending BetterVoice to everyone in my studio and all my singer and speaker friends.