Everything about this bar is quality. I noticed out of the box, the quality welds on the collars, the very grippy but not aggressive knurling, the stainless steel feel, the center knurling smooth enough not to be abrasive on cleans but hashed just enough for just a little grip on back racks. Everything about this bar is quality.
To be honest, I got this bar because barbells everywhere else are out of stock. If you can afford this barbell, and your focus is on Oly lifts, and this bar is still available, then just get this bar. For Crossfit workouts and power lifting, I'll keep on using my 3 year old ****** [R] 2.0 bar. Yup, even though it is supposedly an F8-R on their scale, the knurling has worn with the black e-coat faded where I grip the bar, the composite bushing is coming out in little pieces, the overhead bumper plate drops sound louder, and there is practically no spin on the collar now. Bear in mind, I used it only about 3 times a week in my garage. I think the thing that matters is not some proprietary steel strengthening tech, but the quality of the construction.
The [R] 2.0 has been a good bar and will continue to be a good power lifting and a many messy reps metcon bar. But I'm glad I switched over to the American Barbell SS Comp Bar for my upgrade bar. I was thinking of getting a crash cushion before. But paired with my [Vulc] bumper plates, the dead drop, single bounce a few inches off of my 3/4" horse stall mat w/ two 3/4" plywood underneath platform seems to be 1/3 to 1/4 as loud as my rattling [R] 2.0 Bar. This is perhaps an even better indicator of the build quality than visual & tactile first impressions.
Here's a picture of the center knurling so you can see how smooth it is. Just get it.