I have this one and use it regularly. The slide/push button lock works well as a safety and to open the lid. The small glass window gives me a pick at the propane level.

The first time I used this lighter at altitude I couldn't figure out why the flame was so inadequate. But after a "thump on the side of the head" I realised that I had set it for my home altitude of 1850 ft and that I need to adjust the flame height screw for my new location. Since then I haven't had an issue with it. You can adjust the flame height (actually it's more like a torch than a flame!) to suit your needs. It performs well in strong winds.

It has a rubber seal/gasket that is to prevent water from getting into the mechanism - I've never tested it as I always keep my wick dry! Survival gear should always kept in good condition, IMHO, otherwise what's the point?

I got mine in bright yellow - a lighter is not something you want to lose so I stayed away from green or brown or black. Dark colours are for city folk and not for out in the woods. I don't remember what I paid for it as that was many years ago, but it bears a painted logo from the store I bought it from.