What the first reviewer said. The main problems:

1) The gimmick is much too loud (there's a reason the promo video has that techno music pumping over the demonstration). The "engrish" instruction sheet, in one of the few comprehensible sentences, says, "Please cover this sound by concentration. One! Two! Three!" That might work if you're Gilbert Gottfried, but otherwise, no.

2) It's probably not too much of a spoiler to say there's some string involved, but it's not invisible thread, it's normal thickness string, and it would be very obvious in all but the most dim lighting. (Note the magician in the promo video performing in front of a dark curtain, but I don't carry one of those around with me.)

3) The description says "instruction sheet in Korean and English", but the "English" instructions have sentences like "When finally pull the silk, if push the button (No.2), No.1 is come back again to No.2 turn around the pillars." Now, I can generally figure out what the instructions are trying to say (and how to get the silk to "pass through" an object), but it looks pretty bad if you do it just following the "engrish" instructions. Maybe the DVD contains more detailed instructions on how to do it better, but I don't speak Korean. (And even doing it "well", it will still only work against a black background, with loud music to cover the noise.)

I've been looking for a good silk penetration trick for a while now and took a chance on this one. Before I even had a chance to give it a trial run, I regretted it. For starters, the gimmick is loud. Real loud, which isn't so bad if you happen to be performing the trick at a Who concert, but for casual impromptu demonstrations it's completely unsuitable. Not examinable either.

After several attempts to use this poor excuse for a hanky, the "gimmick" disconnected from the silk, and it took me a couple of hours to fix the problem. To top it all off, the DVD and instructions are in Korean, so if you can't tell how to perform the trick by watching the video demo above, you're out of luck.

With any luck, JL magic will discontinue this one as soon as possible.