The only negative I could find with this product is the fitment wasn't OEM exact for my vehicle. 1997 Volkswagen Jetta GLS, 2.0L, 5-Speed. The inlet and outlet are just a touch too high and a touch too long compared to the OEM part. However, I bent them down very gently in order to get them into the airbox and then, once the system was back together, I had to bend the ends up slightly(again, very gently) to get it to line up with the expansion valve.
Other than that, it is a good product for the price.