In reply to mike steele:
If you don't ski they're great. Like Mike 99 says, they're a compromise, and less practical than a ski touring set-up. The actual snowboarding is fine. It's more the width/ski flex when ascending that can cause issues. In firm conditions you should apply ski crampons a lot earlier than skiers to prevent sliding, especially when doing kick turns. Reading the snow conditions in front of you is really important because it's way better to have your ski crampons on before you reach slippery terrain than to get in a sketchy situation and then try putting them on.
The set up that mike 99 describes sounds perfect for the Alps. Spark and Karakoram bindings help a great deal. Doing a course with James Stentiford or Neil McNab will be a real benefit too.
In saying all this, I've been snowboarding full time for 20 years, 12 winters in Chamonix however I much prefer using skis for touring even though my level of skiing is way less than my snowboarding. Skis are better in every way, especially if you wish to access climbs, and I wish I put more effort into skiing earlier.