Yeah, the LBS is right, I've spent thousands of pounds on new spokes since I've had the Tannus tyres fitted. Hardly a meter goes by without a spoke pinging, ohhhh hang on, nope that's completely wrong, I've done over 3000 miles on them, over all sorts of crappy surfaces / pot holes etc, do you know how many spokes I've broken, I'll give you a clue, it's less than 1. The problem is that some people will assume that because they tyres cant puncture, they can ride into holes, and cracks that they normally couldn't / wouldn't, the holes and cracks they hit, because they assume that the tyres / wheels an somehow defy the laws of physics now, would account for a wheel / spokes with a pneumatic tyre as well, the problem is that they would then have a puncture to deal with as well. The tyres can't puncture, but you still have to be careful not to extract the urine regarding bad pot holes and the like.