In this task, you're given a review from Amazon's food products. Your task is to generate a rating for the product on a scale of 1-5 based on the review. The rating means 1: extremely poor, 2: poor, 3: neutral or mixed, 4: good, 5: extremely good.

Let me give you an example: I have bought several of the Vitality canned dog food products and have found them all to be of good quality. The product looks more like a stew than a processed meat and it smells better. My Labrador is finicky and she appreciates this product better than most.
The answer to this example can be: 5
Here is why: The user really seem very satisfied with the product and gave good review worthy of 5 stars rating.

OK. solve this:
I have mixed feelings about NuNaturals Nustevia White Stevia with Maltodextrin Powder and will probably not purchase it again. Don't get me wrong, it's a great tasting stevia extract and very easy to use, but it is just 6.4 percent stevia and 93.6 percent maltodextrin filler. In other words only 6 pennies of each dollar you spend on this stuff is buying you high quality stevia extract powder. In my opinion, this is unnecessarily dilute; however, it does make it exceptionally easy to measure. If the labeling said 6.4% stevia extract, I would have passed on this from the beginning as I can get 70% dry stevia extract of the same quality for much less money per serving of stevia. If this is your first time buying stevia, go for it as it's easy to use and tastes great. If you're accustomed to buying and using concentrated stevia extracts, you will be probably be disappointed by the low concentration of this product's mixture. Pros: - 5-star taste - Easy to measure - Perfect for first-time stevia users - 3/4 tsp = ~1 tbsp cane sugar Cons - Only 6.4% stevia - Not cost-competitive with 70% or pure dry stevia extracts - 3/4 tsp = ~1 tbsp cane sugar Overall, a good product but not the best value. I would given it 4 stars if the product labeling didn't try to hide the fact that it's just not very potent. For about 1/3 to 1/2 the cost of this product, you can buy concentrated stevia powders and cut them yourself with a low-cost filler like maltodextrin and come out ahead (or just use them full strength, which is often easier once you get used to the sweetening power of pure stevia). In case you're wondering where I got the 6.4% (by mass) value from, this is how I calculated it. On a precise scale, I found the density of this product to be 2.5 grams per teaspoon. The label says it contains 40mg per 1/4 tsp. Thus, 1 tsp has 160mg stevia extract in 2500mg mixed powder. The concentration (mass) comes to 64mg stevia per gram of product or 6.4 percent by weight. Pretty weak stuff, but still much sweeter than cane sugar.
Answer:
3