And to continue the thought... I do "quantify" and "qualify" my statements on the BOVs I do have perosnal experience with. Some things I have posted recently.
The Tial will not leak
The SARD will not leak
The RFL will absolutely leak in every case I have seen
The 1g valve is 40 bucks used and has run low 11s or better.
etc
I have no experience with the name brand valves, which is why I will never comment much on them or recomend them when people ask for opinions on what BOV to run.