Amazon calculates a product’s star ratings using a machine learned model instead of a raw data average. The machine learned model takes into account factors including: the age of a review, helpfulness votes by customers and whether the reviews are from verified purchases.
The nose frida is more gentle and simple to use than the aspirator bulb. My bub still doesn't like it, but it's easier and quicker to use, and therefore a lot less distressing for him. It does come apart quite easily - and he's figured out how - so it can be tricky to use with only one person. To improve the product - I'd make the tube a tighter fit so it didn't come out as easily.