Got a 5mm one at the Bristol show and I quite like it, though difficult to A/B with the felt one now as I eventually used the supplied stickers to fix it to the outer platter as it was slightly warped.
Would love to try the Tiger Paw magnetic mod for the platter too.
@Alley_Cat – you’ve piqued my interest, too. i’ve used the A23 standard mat on my LP12, which seemed to do neither harm nor good, but altered the VTA a bit from the standard mat so i switched back.
i’d really like Linn to come out with another version of the standard mat – just in a different color. blue or white would be nice.
There seems to be a reasonable consensus that the Linn felt mat is best. It’s main drawback often quoted is that it lifts easily with a record with static, solutions being either double sided tape or wet cleaning your records.
Personally I have little interest in any non Linn alternatives.