I haven't had a bad flavor yet and I will continue ordering free samples with every order.
Blo'hole Blast is one of the best flavors I ever drank.
Samples were great, it's a bit annoying how each packet is 2 servings so if you wanted only one you would have to manually split it. However it's not like you are regularly buying these, it's just some free samples so not too big an issue (hence why it's still 5 stars). All in all the flavors taste great. I'm not sure if it's random what flavors you get or if it's predetermined by my favorite was Good which is cherry flavored.
I was not a fan personally. I tried multiple methods of taking this but non seemed tasty or appealing. However I was luckily saved by my girlfriend who does seem to enjoy it. Hence why I'd give this a 50/50 rating.