RE: Staybrite 8 Yes or No and why?
I vote no.
While it can withstand the pressure and there are many stated positives, SB8 requires the use of flux, which does not work well in a refrigeration system. Also, there is a very real risk of overfilling a joint and causing either a blockage at the joint (I have seen pictures of up to 100%) or solder balls to be introduced into the system.
For those reasons I feel that the reward does not outweigh the risks.