NAT-PT or NAT64 in real life

Although it would seem that double-stack is still the preferred method of linux distribution, I want my next deployed in IPv6 only. For linux there is NAT-PT tomicki and NAT64 Viagenie. I don't have Cisco equipment although I'd like tested their NAT-PT, even if it's obsolete. Are some of you have installed one of these two implementations in production on recent versions of linux? Is it stable, secure, ... ? Regards