This product uses green screen technology to mimic the invisibility cloak effect used in the Harry Potter movies. Using the App, you get a background image (like your living room) and then can move in to frame, turn the cloak inside out revealing the chromakey green lining which is digitally removed by the Wowstuff app in real time.

Some folks had a bad experience with the app on Christmas day, but I had no such issue. The app downloaded easily on my Pixel 3XL, and once I entered the unique product code that came with the cloak, the app worked seemlessly.

Pros:

Watching someone vanish through the phone in real time is really neat!

The cloak looks gorgeous, suitable for costume or cosplay purposes.

The cloak is heavier weight material of good quality and feels great, almost like upholstery or tapestry fabric.

The app worked flawlessly.

The instructions built in to the app were clear and thorough.

The included phone stand worked ok.

Cons:

The cloak feels like it's for smaller users. I'm 5'10 and the cloak comes to about my knees. This may be accurate to the books, but if you are an adult human of average height, you will have to kneel to make your feet "invisible", more so if you want to cover your head as well.

I expected the cloak to have a hood. It does not. It is unclear from the source material as to whether or not it did. So this is likely more a discrepancy in my expectation than anything the matter with this product.
As such, however, I would refer to this as more of an "invisibility cape" than an "invisibility cloak". Semantics. ;)

The included phone stand won't allow your phone to be parallel to the image you are taking. As it's a stand and not a tripod, the phone is held in place by gravity and your phone rests aiming slightly up. You (wearing the cloak) will need to be higher than the height of your phone if you want to take a horizontal photo (movie aspect ratio). You can shoot vertically with no issues.

Final thoughts:

All in all, this toy married a great app performance with a quality costume piece for an excellent experience. I know there were some server issues around the holidays but best I can tell they seem to have resolved those.

We gave it as a gift thinking it was the coolest thing ever and never heard a word about it. :-(

I got this for my nephew for his birthday, needless to say EVERYONE in their household loves it! I get videos showing he and my niece messing around with it and everyone always has a smile on their face! ONE of the best purchases I've ever gotten him!

My 8 year old went crazy for this. We had no problems with the free app and you no longer have to make an account or enter a code to use it. Super cute and lots of fun.

My husband got this for me as a Christmas gift and I absolutely love it. The price it is now is definitely worth it, especially considering my husband paid double this price when he bought mine. Any Harry Potter fan will absolutely love this as a gift. It's fairly easy to use, all you have to do is reverse the cloak to the "green screen" side & set up your phone and tripod to take pictures where you're "invisible". The cloak comes with a special code to access the app which is pretty cool, so only people that have a cloak can use the app. The only downside is that you better hope you don't accidentally throw away the box or instructions without writing down your code or something or otherwise the cloak will be useless as far as "invisibility" goes. & the app is half of the whole gift, so losing it would be a huge issue.