I've wanted to try the REI matches, need something else to buy to make up an order. I'm sure there are different kinds. Mine were purchased from a well known online dealer of quality survival gear.
As far as shelf life.. The definition of: "Life Boat" matches would seem to imply/require a long term usefulness. They were sealed and didn't appear to be degraded in any way.
I have some coughlins waterproof matches that I will be trying. Perhaps I will try the REI ones as well and let you know how I fare.

The obvious lesson here is that we should all try out the items in our kits before TSHTF. Make sure they do the job intended. Something as simple as lighting a fire or stove with items I have chosen for use in tough times has taught me a lot.

Thanks
Jon