We are very satisfied Calfee owners with around 18-20k miles on our bike. It is also a well travelled bike with more then 20 trips in its cases and we have not suffered any issues from what with the concerns some people have expressed regarding travel with a carbon frame. I want to point out one more thing pretty cool about carbon and a custom boutique builder like Calfee. We completed a tour in Turkey this fall and discovered we had a coupler making noises on standing climbs when either one or both of us stood. We had chased the noise for while before concluding it was from the rear coupler on the lower tube at the rear BB. I could not detect movement of the coupler but the noise was there. I sent the frame to Calfee for inspection and they confirmed that the carbon was moving against the coupler. Our bike has Ti couplers vs the Alu that are now used and the bonding methods have now changed. Our Ti coupler was tig welded to the Ti BB shell so there was not a chance of the coupler failing. Calfee completely rebuilt the BB area and replaced the BB shell and changed the way the coupler was bonded. They did all this under warranty and compleely repainted our frame even though we have an expensive custom shade shifting paint scheme. At the same time I had them retro fit for DI2. I committed all the way and they removed all the cable stops and filled all the wholes in the frame for mechanical. I guess my point is that in the right hands carbon can be reworked to accommodate changes in technology in the future. I have attached some pics of the clean DI2 install. We now have an awesome riding travel tandem with electronic shifting so no more cable issues every time the bike is put together.