Discounts in the midst of choosing a contrib

[mahatmakane_jeeves]

I hope I have posted this in the correct place.

 

I'm trying to decide on which discount contribution to install. :blink:

 

I already have installed the Credit Class & Gift Voucher.

 

But am also looking for something that discounts based on quantities. For example:

=> Buy 1 get the second at 50% is one example,

=> Buy one get one free is another example,

=> Buy 5 and get a 10% discount,

=> Buy 1 at full retail, but 2-4 at X price, by 5 - 10 at X price, etc.

=> Buy product A and get product B for only $X

 

One that will work with PWA as well.

 

So what is your favorite package and why? How hard was it to install and debug (if necessary)?