First of all I must say that I have not bought the soup here on Amazon but in my Trunk Asialaden. All in all, the soup tastes very good, but: Sometimes (not always) you are caught, unfortunately, a cup in which the soup so so foul the smell / taste of the styrofoam cup takes that one unfortunately only can tip off the whole thing. I can similar reports in other Rezis here so agree. Here you just have to a better (and certainly healthier and more environmentally friendly) find an alternative. It corrupts the whole Ramen.
For severity level I can not express quite me, as I often eat very spicy and my assessment would therefore not particularly meaningful. I personally did not find it particularly sharply (in China you get much sharper served), but could well imagine that others take a different view.