Zestify is a scam. It fraudulently tries to take money from you once you purchase items from them. I am in the process of seeking proceedings against them so am limited in what I can say. Suffice it that the message DO NOT DO BUSINESS WITH THEM should be clear enough.
What they offer, TimeLife CDs etc, is very tempting. My original order was okay. The second order created problems including my bank account being rifled by them without my authorisation. Do not use this company, unknown at Companies House. Their website address www.zestify.tv is the company domain of a Pacific Island nobody has heard of -(maybe ouitside standard internet business regulations) - says it all!