So, every day there'll be different products and their price will be guaranteed for that one day only; the exact deal time is from 9am until 11.59pm.
Now there are various terms and conditions but, having read them, there's nothing 'tricksy' in them at all.
The only one you need to be aware of is you MUST complete your purchase in the daily time frame for the discount to be applied, so you can't add things into your basket, leave them there and then pay for everything at the end of the week - not sure why you'd do that, but just in case it crossed your mind...
If you have various things to buy for a new arrival, you'd do worse than keeping an eye on Amazon each day until the 11th - you could end up saving yourself a fair bit of money.
Just remember that the new deals will be published every day at 9am and you'll have until 11.59 pm to compare and contrast the prices of things that appeal to you with other retailers, before you make a final purchase decision.
Thanks to shadow1 at HUKD