It is instant & anonymous* in transacting a premixed balance.
* Provided there is an anonymous IP solution as well which I would prefer if it was offered out-of-the-box.
Premixing a balance takes a ridiculous amount of hours/days/weeks depending on how much you're mixing. Dash is marketed as 'instant & anonymous', not 'instant & anonymous if you premix'. This is why it's a dishonest solution for users seeking privacy.
It's like having to call your order ahead of time when you go to the drive-thru, "Sorry sir, it will be about a five hour wait for your burger. Next time you should call a day in advance."