I got a tent directly from ACI. Felt great setting it up, heavy cloth, nice equipment bar. Light leaks weren't too terrible, but the fact the zipper wasn't sewn in correctly was a big issue. Every time I rounded the lower corner of the door the zipper got stuck and had to be yanked past that corner. Called ACI and they just sent me an entire new tent minus frame. New bag, new tent. Haven't set that new one up yet as I'm currently using the old one as a drying tent so I can't comment on the zipper, light leaks or anything else but ACI did me a solid and replaced the tent no questions asked really.
I was never a fan of the 4x4 design as there's no side doors. For accessibility I had some decent runs with the SF tent. So far though for durability and height I just ended it and went GGT. Going forward if I need another tent it'll just be the GGT as the QC seems better in the small sample I've seen.
As far as the pin holes I doubt whatever can make it through a pinhole in a normally lit room will trigger a response from the plants. As a sort of simple test, take your phone inside the tent and run a light meter app. See if you can get a foot-candle measurement anywhere in the tent from the pinholes. If you can't see that much leakage the plants won't respond. A basic rule of thumb for us simple folk is keep the light level lower than a foot candle inside the tent. That measurement is how much light does 1 lit candle produce at 1 foot distance. I'm not thinking you're getting that much light inside the tent but I could be wrong. Try measuring.