Fast Forward Seatpost - Is it necessary?

I know this is an old thread but thought i would update it with my experience.

KenD and Kido explained it best technically.

It is necessary if you want to take full advantage of clip on aero bars. I put the carbon profiile design FFSeatpost on my carbon Scattante and it made a huge difference in comfort and power. Before i would alternate between the drops, shifters and aero bars because i just couldnt ride in aero as long as i wanted to, now i can ride in aero position as long as i need and is actually more comfy than the shifters or drops but that may be because i have a tri set up and lowered the stem a few rings. i would recommend a FFSeatpost to anyone using aero bars on a road bike.

Also the comment about it shifting the balance and it having a negative effect is laughable. The act of riding in aero position is already shifting weight forward so moving your seat forward 5 degree is not going to make a bit of difference, if anything your balancing the weight distribution because generally speaking most of the weight is toward the rear of the bike. Ever notice if you stand on your bike you coast faster and further than when sitting upright.

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I have the same exact set up on my road bike.  The FF made a big difference in terms of taking full advantage of the aerobars.  Opening up the hip angle didn't really help my run (that I could notice) but it did help with my performance on the bike allowing to get more power down in aero versus a traditional seat-tube angle. 

I'll echo the previous poster about handling issues.  I experienced no handling issues with the FF seatpost and feel very confident in aero.  The "squirreliness" of aero bars on a road bike seems to me a bit over stated at times.  Will some people feel uncomfortable with handling? Sure.  Just like some people feel that a true TT bike can have squirrly handling too.  It just takes more IMO.