I was expecting a loss of induction noise and not a lot else, if I'm honest. I was wrong.
I'm sure it doesn't help that my last Apexi cone filter was a good 5 years old and although I cleaned it regularly it was still pretty knackered and quite dirty/restrictive, because as soon as I fitted the S intake it was like driving a different car

The main thing I noticed is that running on LPG is now even better. Prior to fitting the S intake, I would've compared LPG performance and feel to running a JDM 'Lude on regular unleaded (as opposed to 99octane). Now though, I can barely notice a difference.. I'm so impressed.
Oh and the lost induction noise - well, I used to really like the sound of the Apexi working hard under acceleration, but now the noise is different, not so 'rushy', now it almost has a weird echo, the air bouncing around in that box makes quite a cool sound, I love it!

I would recommend this mod. I would also recommend keeping your air filter clean!