Wow it is amazing. I tested AmzDataStudio with my ASIN, and it immediately extracted the backend keywords of it, 100% accurate! I don't know how they achieved this, but AMZDataStudio can really get exact backend keywords of ASINs. You can immediately get the results thus the accuracy can be observed at once. One tip to share with you guys is if you like their facebook page, you can get a free trial of the tool. I recommend you to use this free trial opportunity to test with your own ASIN so you can see how accurate it is!
It would be better if they can provide more promotion codes on their website. For now I only know a few authoritative trainers have this.