I'm been reading Doug Ritter's work for several years. In general, Doug is recognized as one of the leading experts in the aircraft survival industry. I've always found his opinions to be fair and balanced. He's also not shy about saying why some product is bad, and often talks about a MYOG version that he thinks is just as good. His website does carry some products - but only ones that he's tested and feels comfortable endorsing. He's also responsible for getting several products tailored to survivalist needs (such as a Benchmade Griptilian knife with a stronger tip and higher grind, and a flat Fox40 - which later became the Fox Micro).
In many respects, Doug's website is like BPL. You get good advise from his personal testing, a summary of available 3rd party research, products you can count on, and custom tailored products that work better than mass market gear for specialized activities (like the Ryan's firelite mini, UL180, or Cacoon UL60 Hoody)
As an aside, Doug does say using a regular mirror and the 2-finger / v-site aiming method works fine - after some practice. He also reviews several glass and plastic mirrors that he says work better than the one he chose for his pocket survival kit. He says he didn't go with glass because it might be broken in the plane crash, and the 2 plastic ones that worked better were either too big for a pocket survival kit or too expensive for the kit price he was targeting.
He gives the manufacturer & model info for the ones he thought worked better than his in case you don't want to make the same trade-off. That's what I call fair, honest advise !