If you think that this is good extension but still need some improvement fell free to write.
Use this extension if:
You want to give discounts/free products to choosen customer group.
You want to set different price for some day in week or for different time period.
You want to give discounts/free product/s if customer buy other product.
You want to give discounts/free product/s for choosen store.
You want to give discounts/free product/s if customer have minimum subtotal in cart.
You can give discount for shipping.
You want to set happy hour and for that hour in day some products are cheaper.
You can have unlimited discounts on your site and system will choose best combination
Give gifts and discounts for loyal customers.
Motivate customer to buy more.
Link to Extension HERE
https://www.opencart.com/index.php?rout ... n_id=34305