Wow is it worth the money. I love mine and have used it as a mountain bike on single track and as a fast endurance road bike. It is really fast. It is extremely comfortable and stable. The most efficient power transfer I have ever experienced on any bike and you can ride it happily on really rough stuff all day. Vroomen left Cervelo, is part owner of 3T and designed the Open. It truly is a great do all bike for anything short of heavy MTB. On single track it is so light that it makes biking a completely different experience. It eats Gravel roads for lunch and is a no comprimize fast road bike as long as you have the right tires and wheels on it. No problem with Di2. I am actually not riding my MTB any more and this is my bike of choice for distance road rides. There simply is nothing better for gravel. My only complaint is that it does not have fender or rack mounts and I'd prefer 5 -10mm more stack, but a few spacers cures that. I had one built to my spec at SweetWater Bikes near Pittsburgh and they did an outstanding job helping me pick the best components for it. It is also quite beautiful!