Pros: Bass, Build Quality, soundstage, good balance (low, mid, high)
Cons: Lacks Clarity, Isolation, Comfort (earbuds)
Thin wire, but further more everything looks tight.
Sound quality: 4/5
It’s personal but this is my opinion: this IEM comes short on all fronts except bass and soundstage, from which the last is an obvious result of the use of ventilation holes in the back of the housings. The bass might even be overpresent for some (it is the Bass edition though), but the key fact for me personally is that this IEM lacks clarity in mids and highs (dull) and seems to lack a good sub bass (might be due to the ventilation, non closed means it's harder for an IEM to produce the pressure needed for sub bass). Some people may find and call the dull sounding highs and mids “warm”. But again, that’s personal, I find the sound dull.
Sub bass: 3.5/5
The wide soundstage as a result of the use of ventilation holes also has a downside: less isolation. But it’s still pretty good for a ventilated IEM.
What can I say? The IEM has a more or less standard design for a sub € 50,- model. It’s pretty big which makes the housing come in contact with the ear shell and will eventually cause irritation (for me within 2 hours). Besides that the Bi Flange is terrible, and a real downer for me personally as I expected more of it. The seal is too tight which causes a pressure change in the ear. If you pull the ear shelf up and back to straighten the ear canal and push the IEM with Bi Flange in as deep as possible and as far as is it’s comfortable, and then let go of the housing, it then pulls a bit back sucking the air in the ear canal and so the eardrum. You then hardly hear any sound at all. Even if by some miracle you get a good seal, the isolation isn’t that much better than with the use of single flange tips. Also the Bi Flange is a pretty big tip, which isn’t comfortable for people with smaller ear canals in general.
If you like a dull or "warm" sound with enough bass than this is your IEM. Beware that for long use the available tips might not suffice. I recommend to get comply T(X)400 tips with this IEM (Shure olives do not fit as the nozzle is too wide).
I personally prefer Shure olives over comply tips due to the durability, and have succeeded in modding the tips. You can do so by taking a metal stick (I used a screw driver) from which the diameter is a little bit wider than the diameter of the nozzle. Stick it in the Olive with a bit of force (I stuck it in all the way through the mesh) and heat up the metal (for example by using a cigarette lighter). Let it sit for a while (about 10-15 mins) and voilá. You can now place it on the nozzles.
Tip: take small sized Shure Olives if your a medium user. The wide nozzle pushes out the foam filling up the ear canal more than normal.