Yeah, 18 months, a few track days, and about 15k street miles and they’re still good as new.

With generally positive experiences, makes me think, why it was so hard for whiteline to get it right in past.

I seem to remember Whiteline just sold their WRX offset top hats for the Twins, but the Twins had a greater angle between the top hat and the strut. This was fairly common for the Twins at the beginning, where other Subaru models' aftermarket parts were sold as-is because they kinda fit, but that often ended poorly. Luckily we have plenty of custom made Twin parts now.

Amazing, thanks guys!

Is there a detailed DIY install for these? Does the strut assembly need to come out for install?

Any of the strut install DIYs here is basically the same. Struts must come out. Subaru recommends new nuts for the 3 on the top hat and the one on top of the strut. Don't turn the strut top nut without holding the shaft. I used a pass through socket and an allen key. I also used new bolts and nuts on the bottom.