I bought an RM15 (I think) earphone from Mr DiY before.

Many sounds got lost , especially bass. The sound also feels like it came out of a tin can. After a few days of use, the wires crap out whereby slight movement of my head will cut out the sound - a very typical issue with earphones when they've been used for some time, but not after a few days.

Then again it was RM15, so the above is pretty much what I expected for that price.