Assembly was fairly easy but the one thing that drives me insane is that the containers dont sit flat. the failure rate is at 95% based on my experience. Ive had bone grafts and titanium stents in both feet, so I make sure to keep the supported. They will fit her a long time and I like that value. I figure a few hot water washes will fix it for him. To sum it up I ised the small size and they both stay in my ears. However, when I received the product, there were manufacturing defects. The instructions are adequate but not great, but once you figure it out, youll never need them again anyway. If you use the microphone cose to your lips you will sound so, so high. This thing charges faster than my iPad charger.