I ran a test today using a popular exchange and a simple withdraw and re-deposit of funds back into the same account. The fee total was 0.00669600 GRIN (0.00001000 btc) or .034 cents (usd).
I was able to generate the slate instantly and within minutes was able to close the slate file, uploading back to the same exchange account without any issue.
For 3 pennies and a few clicks of the mouse, you have full sovereignty of your funds in seconds.
Thank you Grin team for this wonderful innovation. Knowing, for the first time ever, that I can ‘grab & go’ from an exchange is peace of mind. Grin is a… 10 out of a 10… please keep up the good work.