New chap here, returning to the gentle art after a gap of far too many years

1st brew on is a Wherry (didn't stick either) can't wait to try it, next one planned when I get my 2nd barrel will be the infamous Coopers stout

Now to my question...... Has anyone heard of a company called PureMalt Products? I was given some in plain packs that had come from 25kg sacks. I have some roasted and some light (might be medium tho). I know for a fact that it is food grade and I'm tempted to use this in my coopers but not having used it before or even heard of the company I don't want to spoil it...... The extract seems to be sound with no lumps or signs of damp.
Any info that anyone might have that would ease my fears would be appreciated

Thanks in advance Tom