I used the Complete Anonymity mode and sent 0.004 Bitcoin to the generated address, and I downloaded the Letter of Guarantee file. Is there anything left to do? Could someone please help those who used Thormixer before? I guess I am free to close the tab now.
Update of my latest Mix.
I have received my Bitcoin in two transactions (0.0014 + 0.001688 = 0.003088 BTC).
In my case, the fee was 0.0007 + 0.000212 = 0.000912 BTC. I received the Bitcoin from 2 of the 2 multi-sig wallets, and they have paid 20 sat/vb, which is more than the average fees now. Everything went so smoothly; it was the simplest mix I have ever made. I have used four or five mixers before, but this one is too simple compared to all of them. Also, I noticed the gap between those two transactions. It was about a three-hour gap, pretty good for privacy.

Great to read your review bud, can't really wait to run my own test mix, my only problem seem to be the fee, but I guess thats not really a problem if..
1. The flat fee is fixed at 0.0007 btc..
2. The user is mixing a very large amount of bitcoins, like from 1 bitcoin and above.
And for me, I don't own that much bitcoin, but considering the fact that some of us are earning from advertising the platform on this forum, I guess the fee is really nothing.
And speaking of the time gap between the two transactions you made, didnt you set a delay time between the two? Some other mixers I've previously used usually had a delay timer feature, which helped to delay the time transactions are sent between the receiving wallets set by the user, and the timer works according to the users preference/setting, the user could choose 1 hour delay, 2 hours or even up to 12 hours between transactions.
Anyways, all good.