I have a Gplus "ebay" inlet, and have used it for 2+ years. So far it has held up just fine but ymmv. Mine did have some aluminum shavings in i when i got it but after washing them out it has been fine.
I have the G-plus. It has held up fine. I see no need to buy the same item for more money when it has been 100%. I understand you pay for what you get but I really have never heard one bad thing about the G-plus intake.