Given an Amazon review, indicate whether it is a 'Positive Review' or 'Negative Review'.

Ex Input:
It works and is half the price of the exact same product at Costco. What more could you ask? I have ordered several of these just to have extras for backup.

Ex Output:
Positive Review

Ex Input:
Thought it would speed up my computer but feels the same as my 4GB kit. I feel like I was cheated.

Ex Output:
Negative Review

Ex Input:
however the 4 Harry Potter vides I purchased in March have been deleted from my device by custmer service Folks, witha promose by one that I woould receive purcase credist on my act to repurchase same, but not here yet as this may have been overruled. I have just repurchased one of them nnd purchased another vidio, but I tthink we will have the same problemms occur again as I think my device is still mis registered if so its off to barnes & Noble

Ex Output:
Positive Review