Please get over yourself, I have as much right to say what they don't like about a product as you have to say what you like about it. You're not the boss of me.
I want to buy a good product, but if vampire is not good but a lot of people buy one then I won't get to buy a good product as it won't be worth anyone making one. Just because you lack empathy doesn't mean I will disappear.
You do not solely define "good product". All Vampire owners I have ever read of are very happy with it and recommend it to others. You can say you would use it for this or that and because of that you need a certain missing feature but that does not make it bad. You are not master of universe I assume