It was very easy to assemble and will be great for barbell work. The reason I give it 4 stars is because I works fine and my wife has me at a point in my life where I could care less if my airbags deploy. Several things I like about this product:1. A few days ago I was looking to BUY something on Black Friday. These earbuds have 5 hours of playtime (at 50% volume), Charging case provides an extra 35 hours of battery life with the cradle, and they charge super fast. I had a cheap pair in the past that I bought at big 5 for 12 dollars, they lasted two years and I never saw a crack like that. I think it lasted the 35 hours. They didn’t make me taller or feel like I was going to fall over. I switched to a gel decades ago because the solid always left marks on my shirts. So because I adore Birkenstock, I tried these.