First, I want to say that this is the first coin through glass I have purchased and I am happy with. The design of the gimmick is very fooling. The only difference between the gimmicks coaster and regular coaster is the thickness, but other than that is very well designed. I’ve fooled myself the first time I preformed it because it looks that good. The tutorial is well thought out and covers everything you need to know. I took off a star because for me, a 5 star trick is a perfect trick. The gimmickry part of the coaster could break if you are not careful. They tell you to watch the tutorial before handling the gimmick, and that is very true. Once you know how to handle it, you won’t worry about breaking it. However, one reason I love this trick is just how clever the secret is. It looks like a regular coaster, and spectators have not asked to inspect it. They are more focused on the glass and coin. Again, Chien gives you ways on how to handle switching the coaster out. The tutorial is in Chinese, and the subtitles were a bit small for me, I had to pause to read them, but was not awful. I really love this trick and if you want a coin through glass that doesn’t look like a magic prop, I recommend you get this.

The gimmick is wellmade, it works on an old principle methods well disguises.
Diameter: about 10cm = 8inch it doesn't look suspicious at all looks like a really coaster , so it's great for close-up, works perfectly as in the video's description.
Videos , the first video is 1 minute on how to protect the device , second video 40:14 minutes (Chinese language with English subtitles) covering everything and teaching for the beginners some coins sleight of hand. I own other gimmicks such as "leap" and similar gimmick and one big electronic device. This is easy to carry on and good for walk around restaurants and more , I definitely highly recommend to purchase this one, because it's really good .

This is the closest thing to watching real magic as you're going to get! You'll fool yourself!!! HOWEVER...

Everything in the video is accurate EXCEPT...

1-Mine does not lay flat (at all) as it appears to do so in the video. The coaster sits up off of the table or bar top about an 1/8 of an inch more on one side versus the other, which is enough that something looks "off" to the spectator. You cannot bend the coaster at all to "adjust" it.

2-You can angle it so that the part of the coaster that is slightly elevated off of the countertop or bar top is towards you, but it's very noticeable from the side views. I mix mine in with other coasters (plus you get an extra matching coaster that is ungimmicked that I mix in as well) and set it on top of a stack of 6-7 of regular coasters so that the spectator has it "elevated to see the magic better." This makes the fact that even though one side of the coaster won't lay anywhere near flat on the countertop, it's now harder for anyone to notice because the cardboard coasters below it help obscure the difference. As a side note, I have about 50 genuine craft/cardboard coasters and this one is larger than any of them.

3-Also, in the video when he is "rough" with the handling or sets the glass on the coaster casually or firmly, it's extremely risky to do that...mine requires you to set the glass on it extremely carefully/gently or it will ruin the effect instantly.

If you can live with the above, you are good with audience management, and you practice the moves so that everything you are doing looks smooth and natural, it's absolutely amazing!!!

The coaster does not lay flat on the table/bar but that's not too big of a deal if your spectator is in the right place.
All of that is fine but what I don't like is it's not as fast as in the trailor. There is no way this will not be caught in slow motion as the trailor suggests. I can see it with the naked eye. Granted, I know where to look but it's still no where near as fast as CTG or Leap.
I've also had no luck with penatrating 2 coins as they almost always get "hung up".
All in all, you're better off spending your money on CTG or Leap. And right now you can pick up Leap for less than $60 on some sites and its a much better version of coin thru glass, IMHO.

I have been doing magic over 50 years. This works will zero skill right out of the box.
The best move is with tape on palm and simple mis direction...way cool love it.

Awesome. Really clean and mind blowing.

This is an excellent product easy to do and packs a big punch highly recommended that is you want to get your full moneys worth