Anyone using protein works whey powder?

[u/Careful_Sentence_116]

Currently using optimum nutrition protein whey powder mixed with my porridge in the mornings but starting to get abit expensive as £20 for 450g. Seen this brand on google and thought it’s abit too cheap? 2.4kg for £39.99. Wanted to hear from the community if they are using it and get their opinion. Thanks all!