The 1st suppressor I bought was quiet enough, but was a POS when it came to POI repeatability. I'd get a rifle all centered up at 600yds with it, then remove & reinstall, being very careful to use the same index mark as before, and POI would shift at least 1 MOA, every time.
Sat that can aside & bought a TBAC 30BA - what a difference! Just as quiet, but accuracy was never less on any rifle with can mounted than without, and in several cases, was actually better with the can. Year later, bought a 30CB9 - same or slightly better results. Bought an Ultra 7 when they were announced, and also sent the 30BA back to get it re-cored with the Ultra 9 baffle stack & CB mount. Could not be more satisfied with all three of these cans, and TBAC's offer on the Ultra re-core was well worth the price charged.
Oh yeah - got lucky and found a class III dealer who was looking for the correct can for his SCAR 17 - was able to trade him that 1st can for a SF SOCOM 762. It's not as quiet as the TBACs, but it's accuracy & repeatability is a huge improvement over the can it replaced.