I set out to buy a new 6800 mechanical equipped bike and had an order placed for a 2014 Felt F4. Waited and waited and found out that I was waiting for a bike that was sold out and unavailable. I was offered a 2014 Felt F2 with Ultegra Di2 and sprint shifters for same money, previously ordered bike was paid in full. I took the offer and got the bike and after a Summer of riding and really no maintenance to speak of out side the normal cleaning and lubrication I am sold on Di2. It does lack the feel of mechanical and is like pushing buttons on the tv remote but it shifts so nice and it's quiet no reapplied servo motor noise. I also like the sprint shifters. I can shift with very little effort while in the drops with my thumb. I am very happy with the bike and I would recommend Di2 to any one. Battery life is quite long and with the battery in the seat post it really is a clean looking groupset.