Situational, but good if you meet the target audience.
Sharks, like Derbies, are one of the families of blades that are beloved by some and hated by others. As far as aggressiveness goes, this is a pretty mild blade--think lemon shark and not great white. I would not recommend this blade for someone with coarse hair and/or someone who only shaves every 3-4 days.
However, if you fall into one of the below categories, you may like them, especially given the low cost:
-You are a beginner and want to get your feet wet in the safety razor ocean while minimizing nicks and scrapes; while you can nick yourself with any blade, these are very forgiving compared with Feather, Kai, Personna, and any of the Gillettes other than perhaps the 7 O'Clock Yellow.
-You just picked up a new razor, especially an aggressive one, and want to "tame" or dial its aggressiveness back a bit
-You have fine to moderate hair, you shave every day, and you are prone to irritation from more aggressive blades
I find that QC on these tends to be a bit less stringent on these than some of the more well-known blades, but given the price, this is forgivable, IMO.
They are not my favorite blade, but they are worth a try.