Let me start by saying this little speaker has completely transformed my shower routine. The C15 isn't just waterproof - it's practically aquatic! I've accidentally dropped it in the tub multiple times, and it just keeps playing like nothing happened. That IPX7 rating is no joke.

The sound quality blew me away for such a compact device. When I first turned it on at 50% volume, my bathroom mirror started vibrating! The bass is surprisingly robust - I can actually feel my shower tiles shaking during bass-heavy tracks. Yet there's zero distortion even at max volume.

What really surprised me was the battery life. After charging it just once when unboxing, I used it daily for showers (about 30 minutes each) and it lasted nearly three weeks before needing a recharge. The USB-C charging is super convenient too.

The LED lights add such a fun element - I love switching between the color modes depending on my mood. Pro tip: The disco light mode turns any shower into an instant dance party! Though I do wish it remembered my last light setting between uses.

Beyond the shower, this speaker has become my adventure buddy. It survived a kayaking trip where it got completely submerged multiple times, and the built-in strap makes it easy to attach anywhere. At campsites, pairing two speakers in TWS mode creates impressive 360° sound that fills our entire site.

My only minor complaint? The Bluetooth range could be slightly better - walls tend to interfere beyond about 20 feet. But considering everything else this speaker delivers at its price point, that's an easy compromise.

Whether you're looking for shower tunes, poolside beats, or camping entertainment, this rugged little speaker delivers exceptional performance that punches way above its weight class. It's easily become my most-used gadget!