Usually going for the cheapest, I've tried four different one's this year as the first batch was rubbish.
Lidl's compost initally seemed good, very black, smelled ok, well rotted down and had very little if any debris in it. Potted plants- veg and flowers- have done well and it's held water. After a few weeks though when the remaining opened bag was used, although sealed at the top with pegs there was a strong smell of amonia, made a mental note if using Lidl compost to use it ASAP.
No complaints with Murphy's compost, used 3 bags. Slightly more expensive than what I would spend but bought 3 for the price of 2.
Greenline from Aldi-usually very reliable was ok, did have woody bits in and some plastic but on balance would purchase it again.
I mixed bought compost though with home made compost, (until it ran out) and added FBB or growmore depending on what was going in the pot. Also added perlite into the mix to retain water and pots have had seaweed added as a mulch.