You betcha! I have been for several years now. So nice when out popping ground squirrels and prairie dogs. They stay up for a long time and no muffs required. I love it.
its fantastic to shoot it suppressed, although i still use ears, but usually just basic foamies when shooting suppressed - unless of course there's other shooters around who arent suppressed and then the proper ears come out.
I use my TBAC 223P-2 on my CZ 527 Varmint 204 and it is very quiet.
I've talked to TBAC about sending it back and they will recore it and basically turn it into a Ultra 7 223 but I haven't done it yet. It's a pretty quiet can now but dropping a few more dB and making it a little lighter sure wouldn't be a bad thing.
just got the Sig Sauer SRD556 and it work really good. sound reduction is really good plus i was surprised at the recoil reduction. it was worth every penny and the weight