Just got my Rose North Forest! First impression: very bass heavy. Even compared to the LKER i8, which is known to have prominent bass. To me, the bass in the North Forest bleeds into the mids/highs and makes everything sound a bit muddy. It's less noticeable in acoustic songs and songs that emphasize vocals, but with EDM it's hard for me to appreciate much else because the bass dominates the sound. The good news is that after EQing down the low end, the mids and highs come through a bit more. In contrast, the bass on the LKER i8 feels more controlled and tight out of the box. Other thoughts: the multi-function button doesn't work with my Android phone for some reason (I haven't had a chance to test the microphone yet), the earphones are super light and comfy, the fit is excellent, and there is noticeable microphonics from the wires that attach directly to the earpieces but none from the main cable.
Compared to the Yersen FEN-2000 (keep in mind, this is from memory since my Yersens are out of commission currently), the Yersens are more balanced and detailed. I had some issues with fit and driver flex with the Yersens though, which I do not have with the North Forest.
Early verdict for the Rose North Forest: Even if you are a bass head, I think there are better options at the $25-$30 price point. I enjoy my LKER i8 (~$30 at time of purchase on eBay) much more when I listen to music that is bass heavy. To me, it's more crisp, has better instrument separation, and an overall cleaner sound. The LKER i8 also feels more "fun," perhaps due to its slight V-shaped signature. My KZ ZSR is on the way (which I understand is also known for its bass) so I'm happy to provide a comparison once I receive them!