I can't specifically speak to its performance compared with a brand new factory unit, but I can confirm that it did show a huge improvement over a factory unit with 125K on it. Boost onset is now smooth and very predictable. Before, boost would come on unevenly and sporadically.
I bought into IPD's "HD" brand this time because the cost wasn't that much higher, and I liked the idea of a longer lasting valve.
If money is really tight, I learned that several Subaru TCV's are plug and play and you can get those for ~$12.
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