Cons: Size of sounds are small. Acoustic of instruments (mids) are limited. Treble quality and detail level are below average. Even the bass is not complete
i know you already looked at the threads full of people, talking about the sweetness of this earphone (eartrash actually). i know they're all talking about how cheap it is and which one is the fake and original over and over again... i know they're talking about some things like "beryllium" that you don't even know what it means. i know all of this makes you wonder this item more and more...
i know you want all of this turn out to be true. you want a cheap earphone that beats the rest of them. but for this particular earphone, all i'm going to say is: just don't buy this. don't spend your 20-30 bucks for nothing... the people you see in the forum threads (and review pages), they're acting like there's no alternatives and it's price is actually $1 or something. for them, the world of budget earphones is collapsed and only piston 2's are left.
actually, if you buy that piston they talk about, you'll left with a small acoustic, bad instrument separations and overall below average sound quality. with piston, you're inclined to feel something missing between the bass and treble, the most important part, mids are suffocated. this earphone is actually pretty much identical to brainwavz m4 (except some frequency balance differences). same compact design, same small acoustic, same below average performance which excels in nothing.
if you think that piston 2 is good because it's price tag, please take a look at this list. these are some prices i've seen lately, some of them are discount prices. if they're not on a discount right now, wait for it or try to save more bucks instead buying something a lot worse like piston:
brainwavz beta was $6-8 on mp4nation (with triple package)
koss plug was $7 in turkey, was $10 on amazon and was $12-15 on koss.com
moxpad x3 was $11-16 on aliexpress
koss ruk30 was $16-23 on amazon (was $14 in turkey)
moxpad x6 was $18 on aliexpress
brainwavz r1 was $20 on mp4nation
brainwavz s1 was $25-30 on mp4nation
brainwavz s0 was $25 on mp4nation
vsonic gr02 be was $25 on lmue
vsonic r02 silver was $25 on lmue
note: as my price tag shows, i bought it from penonaudio and it was the original.