TL;DR, these are very close to the sound signature of the $150 Shure 215LTD IEMs.
For $45, these IEMs CANNOT be beat.
But anyways, on to the review.
All I can say is, wow.
I bought these simply because I loved the idea of dual drivers for each ear, having a dedicated driver for low frequency... love it!
These things were a complete surprise, honestly. I own a pair of the Shure 215LTD headphones, which were my first 'above entry level'...