The unfortunate thing about intakes is they are a good chunk of cash, few people have tried different types, difficult to know what one is best.
Plus I've not found any same day/dyno back to back testing of multiple intakes on the Mk5.
A few before and after YT vids, but they tend to US based...where their dyno figures are optimistic!
I have a Neuspeed one I got used, one continuous diameter of alloy tube with silicone at the turbo & a cone at the intake, I am happy with, especially as it got rid of the engine cover & the price was right!
Personally, I am not keen on one of the Ramair kits that is a meccano kit of multiple parts, with a reduction in diameter just before the MAF, high potential of turbulence where you don't want it.
That kit looks to me like it's designed more for convenience of postage than performance - but as mentioned there is no back to back testing to confirm or disprove this.