I’ve been buying beans from white roast for about a year, their prices are unbelievable compared to most others, and find their coffee pretty decent, I never really get the ‘notes’ but I drink mainly milk based so probably most of them are hidden by the milk.
My go to is their monsoon Malabar which is excellent and the Vietnamese which is also very good and very cheap, can’t say I’ve ever smelled sour milk from any bag of beans I’ve ever bought though and I’ve been buying beans for about 15 years, we go through about half a kg a week and about a kg a week when my two adult kids were living with us.