I'm also a little surprised about some of the opinions regarding briar stems.
:?:
But the same thing goes for acrylic vs. vulcanite, so here we are.
My only experience comes from the Genod allbriar which I've only had for 3 months,
I actually love it and I don't experience any negative aspect with the stem at all.
One of the most common ailments I've seen besides dental damage, is a slight discoloration in the briar,
and that's just an aesthetic issue and completely dependent upon the reaction from an individuals saliva,
some people have some strong stout spit it seems!
(that phenomena also occurs with vulcanite)
I think a briar stem will have no problems with longevity either,
look at the stems on these 60 year old pipes,
http://www.worthpoint.com/inventory/search?query=allbriar+pipe&categoryurl=
and most of them look better than vulcanite stems of a comparable age!
Some people are just bad on buttons regardless of what they're made of,
like this estate:
Here's another nice oldie,
an unsmoked Wally Frank estate that was sold by Smokers Haven,
I don't really see any cons,
but that's just me.
I'd never heard of A. Beck, but found one of his pipes on worthpoint,
the blurb is from pipedia.org
Aaron Beck created exceptionally fine pipes since the mid 1950's in Queens, New York. The hallmark of his work was his unique ability to combine bits of wood and other materials in a kind of sandwich manner to stems and / or shanks that added a very special dimension to the smoking instrument.
Here's an allbriar that he made:
...and another Tom Eltang,
just found this one while looking thru worthpoint,
you rarely see a sandblasted allbriar,
there are only a very few that've been made I think...
Chris Askwith has made one,
This wild Todd Johnson is a nifty eskimo variant,
What's really rare or scarce is a full-on allbriar in the traditional shapes,
they made them in the old old days, but they hardly ever surface on the collector market,
this one is a Seadog and it was made in France,