Does not pay cashback
I would not bother buying from Furniture123 via Quidco. My purchase never tracked, I submitted a claim and it was rejected too; "no specific reason" was given by the retailer.
The bed I bought is nice, there was a part missing, which was sent quickly directly from the manufacturer. I am happy with the purchase but I wish I never bothered with Quidco, to save me hoping to get the £12+ cashback.
Lesson learned, if something is worth its money, or you can use a discount there and then, use it. If not, don't count on Quidco to sweeten the deal.