I know there have been a few threads about mpc but I have noticed this year that many of them have deteriorated markedly. Arthur Bowers mpc, for example, has so much unusable material.......perhaps 10%, maybe more. I recently bought a bag of Levimgton compost boasting its "waterlock system". It feels better and looks better but whether it's a better composf remains to be seen. Bought in 70 litre size, so slightly heavier.
I am tempted to email Arthur bowers about their compost......why isn't it graded more efficiently? Prob won't though. Just won't buy again.