Yeah it doesn't seem too difficult to me to see when reviews seem fishy. I have never tried fakespot myself.

Another thing to check is that the reviews match what the product is for - I have seen a lot of Amazon listings where the seller will have a product up for a long time, get a lot of positive reviews, then change the listing to something else. So it looks like the listing has been up for a long time with good reviews but it's really a different item. Then note the seller and don't buy anything from them lol.