I didn't realize IEM (In Ear Monitor) has been improving a lot of late. I started using ear buds back in 82 when RadioShack used to make them. Worked great with Sony Walkman. Kinda put in in the ears, and run the line above the ears, and your teachers will never know you had music playing. Those things were painful. But people figured out how to make them better. Then later on IEM were all the talk. Shure made high end ones. But I was too cheap to buy them until something like 2010. There bottom end one, se115, for discount. Then maybe ten years ago got a Bluetooth se215 while on sale. Liked se115 much better. Lately, I wanted something with less bass, something clean, crisp, and bright. So stared looking. Holy crap! There are thousands of them. What people say is much better then se215 or even se4xx for just under $50. All made in China, and people actually loving them. I'm just confused and totally lost. Got one that had a good review, but not sure at all if I'll like it. Good thing I got it through Amazon. They'll take back if it's not as good as se115.