It actually makes a huge difference. So much quicker and cleaner plus you've all your pucks in one place so you can compost them/chuck em on plants etc.
Can't remember where I bought it but it was from a brick and mortar not that link.
Oh don't get me wrong, wasn't debating whether or not a knock box was worth getting! More along the lines of, aside from the super cheap crap ones, is there a meaningful difference between any of them. The two suggested plus the Cafelat ones all seem on par with each other. Thanks for the info all!
Nice! Definitely sounds better than my current setup of a bit of kitchen roll over the edge of the bin...