You are given a review of Amazon's food products. Your task is to divide them into two classes: negative or positive, depending on the content of the review.

Example Input: The 4 pounds of sliced meat itself are contained in a single cardboard box; no vacuum seal or even plastic wrap.  That box is placed in another box that is lined with styrofoam sides, styrofoam peanuts, and three frozen "ice" paks.  It was shipped FedEx 2 Day (that's what the label says), not Overnight or next business day, which begs the question, what exactly did the $52 in shipping charges for 4 lbs of meat and minimal packing materials actually go towards?  I think I know, and it wasn't shipping.  Years ago "Grecian Delight" (the brand on the box) was sold in a local supermarket chain in Gyro Kit boxes - each contained a pack of sliced gyro meat, one pita, and a small container of tzatziki sauce.  I loved them, but I haven't seen the kits in decades and was happy to find a way to once again stock the freezer with gyros-in-waiting.  The gyro meat itself, which I have ordered before, tastes just like ... gyro meat!  As I said, I love gyros, but there's no place nearby where I can drop in and enjoy one.  So I have ordered the product in the past, but in this case, I've ordered for the last time.  I've gotten the individual 1 lb vacuum packets before 3 at a time and they've arrived frozen or nearly frozen. Not so this box.  The meat was not only thawed, it was only slightly cool. I'm afraid I'm going to be throwing it out.  Too risky.  For $52 shipping charges, it should have arrived in perfect condition. Overnight. I won't make this mistake again.  I can't afford to.
Example Output: Negative

Example Input: Zen brews up to an golden amber liquor. The aroma is sweet spearmint. The blending of this tea is excellent--spearmint could be overpowering but they use just the right amount of it. Slightly sweet spearmint is the primary flavor, then you taste a hint of lemon. The green tea provides an herbal base for these two flavors that makes the intial impression of zesty spearmint and lemon modulate into a substantial potion. Very nice and satisfying with a clean spearmint aftertaste.  Remember that this tea does have caffeine--however, it does not say how much on the box. A good estimate might be 30 mg--compared to 90mg for the average cup of coffee. Make sure you time how long you brew this tea because if you brew too long it becomes bitter. Four minutes is ample.
Example Output: Positive

Example Input: These machines are prone to not pumping water and "short-cupping" (delivering too little water into the cup. Keurig likes to tell people they need to descale because that means its a user problem and not a design problem. But using distilled water won't prevent the problem. If it did, a lot of us would be happier--not thrilled but happier. You need to read thru all the comments to understand the prob. Keurig has changed the pumps in their design at last 3 times in the last two years but the problem isn't the pumps; it's the valves.  The most reliable way to unstick the valves is to remove the water tank, unplug the device, hold it upside down over the sink and give it a goo whack on the bottom. Really this works. If you think that's an ok way to operate a device that costs this much, then this machine is for.  More recently we've heard that Keurig support is telling folks that they cannot get a refund or replacement under warranty anymore because too many machines have been returned. Not honoring warranty? I don't see how that's legal. I can believe they are overwhelmed with returns, but that's the cost of business when you sell a bad design, keep selling it, keep insisting it's just scale build-up, keep refusing to continue selling the product. They should have had full recall or refund for its customers.
Example Output:
Negative