Prob agree with that with their branding it’s worth the cash
I recently bought a Keeley from the 'factory'. With being a cbf'er I set about checking the stage where I thought it was in being ready to play.
I saw light seam marks so decided to knock in a little more. I've been told to oil little first as that helps to loosen the fibres prior to knocking in. The oil didn't look to take as well as normal which I thought was odd but knocked it in anyway. Started as usual in the middle and worked my way outwards. In doing so I like to 'push' the non-compressed area around the edges and toe. Not the same amount of compression I'd normally see but it was definitely there. After little more than an hour I was happy it was done.
You can never put the same pre-knocked in bat alongside the same knocked in bat but I'd say the rebound was measurably better. To my mind, I've elongated the sweet spot too. Whether I've made it more match ready, shortened the lifespan or both I couldn't tell you. My feeling is now I'm happier using it in the nets first and see if it pushes up the ranking.
Not a scientific test, as at the time I didn't even know that the reason why the oil didn't take is that to make them match ready they are waxed and buffed at the factory. But because I seem to notice a difference, I've just bought a LV mallet.