I bought a pair from Richard a couple of years ago and found that they put pressure on the fleshy part of my ear. I went back and he reworked them but it didn't solve the problem so I've not used them since. TBF the customer support I received was 1st class but I couldn't be bothered going back a 3rd time and I now use the Autitech ones that cost under £20.
The problems I had could well be down to a snug fitting helmet (Schuberth S2) pushing my ears rather than the custom fit guards themselves so might be worth you checking how much room you have in yours and how big the freshy part of your ear that's at the entrance to the ear canal is.
The Autitech ones won Ride magazine's recent test
https://www.ebay.co.uk/itm/Auritech...=2014644289931141c4a6a1a74014af03911e77263c23