I was going to buy another two speakers today. I put them in my cart and it indicated that I would get a 20% discount.
I then realized that I qualified for a 15% upgrade discount. I removed the two speakers from my cart, select two of my existing speakers to upgrade, and returned to add the two speakers I wanted to purchase to my cart.
To my surprise I was only credited with a 15% discount, not a 15% discount on the price that had been discounted by 20%.
I still wanted the speakers so I figured that I would be able to choose the 20% discount instead of the 15% upgrade discount. No such luck! There is now no way to remove the 15% discount and return to the 20% discount. My attempt to save some money would actually cost me 5% and use up two of my upgrades.
I will not be buying any Sonos speakers today.