I received my vouch copy for this product and here is my review for the same, please note that this is my opinion based on my experience and everyone might have their own.
I received my vouch copy within a couple of minutes when OP & I was online at the same time. OP asked for my email address and gave me the password for Grammarly premium account.
It worked well, and I was able to change the password for it in Grammarly app settings, now I am typing from the same premium Grammarly account.
I would rate 90 out of 100 for this product/service considering the factors like price, subscription features and overall user experience.
Thanks OP for giving me an opportunity to review your product/service. Good luck with the sale.
Best
Dudeperfect