All wood bows are not as durable as their fiberglass counterparts, and they certainly will not last as long. They may last for many years, however. Fiberglass tends to mask any flaws in the wood, whereas an all wood bow will eventually show it's flaws, not only natures, but in design and miss-use.
You must unstring your all-wood bow after every hunt/shooting session to maximize life. Also, an all-wood bow is near it's breaking point at full draw, and given that it may have only so many shots in it's "bow-life", it is wise to shoot such a bow a bit quicker. In other words, if you are a "snap shooter" your bow will last longer than if you "hold" at full draw. Not to discourage or encourage your shooting style, but these are things to consider. Wood has a memory, and it will show it much sooner than fiberglass bows.
Also, they may be more susceptable to environmental changes...something to consider.
So, I hope this does'nt "scare" you off....think of it as being more "in tune" with your bow, and your hunt. There is a whole lot of satisfaction in hunting with these bows and they have soul and character unmatched in more modern materials.