I have the Collins Gem edition (water resistant paper and compact format, but a complete edition, I believe).

From memory, I found no glaring errors. Overall, I give it a 4 out 5. Some of the advice is fairly impractical, not wrong, but not something likely to ever be needed or very doable. Still, there's no harm in including it in what purports to be a fairly comprehensive manual.

I'm sure there are many errors or omissions to nitpick, and some of the advice is likely to be a bit dated by now, but I had no reservations in including it in my wife's BOB as a confidence booster and general guide.

Just my opinion . . .

Jeff