Having owned most of their products, I think this is just as good a deal as the non-mic M4. It's a more refined version of the old M1 and M2 making it a fantastic "fun" sounding IEM for the price. If you love electronica, R&B, hip-hop, house and those kind of music, this will suit you better than the M4. The M4 are considered "clear"? O_O I find them to sound like as if they have a radio-speaker effect that masks the underlying SQ.. I'm not sure why, highly noticeable when I switch from a better audio product (not IEMs) to the M4s and the radio-speaker effect is slightly noticeable after my ears recalibrate to listen to the M4s. Definitely prefer the Feels Pro 9000 over the Brainwavz M4 (yes.. I know dynamic vs BA drivers.. but I definitely wouldn't have paid $69.50RRP on the M4, alright with $26.90 but wouldn't jump-for-joy over them) Definitely the CX300s (legit ones) would have wooped the M4s. I would whole-heartedly disagree with the m4s "urinate over these" (in reference to CX300s). I have CX300s on me right now, in comparison, the CX300s definitely are much cleaner and clearer. In comparison to the Feels Pro 900, I would say CX300s are on par with them, although it is slightly different most likely due to the CX300s being dynamic drivers and the Feels Pro 900 being BA drivers. I personally like the CX300s better than the Feels Pro 900, the bass is a little more