So to complete the discussion:
I rode 2010 F4 yesterday and here are my rather elaborate thoughts..
The bike has the following mods.
1) Power commander with a custom map and a Remus full system exhaust.
2) Brembo master cylinder for brake and clutch
3) Rear sets
4) Quick shifter (after market I believe)
First impression (I am comparing this bike to my 09 CBR1000RR which is a similar 4 cylinder inline super bike). Overall fit and finish is very nice. The panes had DZus fasteners and you could remove all the side and lower belly pan within 5 minutes. Compared to a hour on the new generation Honda
The seating position is very different. You feel like you are sitting "on top of the bike" instead of "in the bike". Nothing wrong, except it felt different. The bike felt a bit heavier (although the bike was almost empty on gas). I can't say if it was just the weight or the weight distribution itself. Again, no big deal.
The bike has power.. lots of it. It wanted to wheelie in every gear. Obviously I couldn’t feel the real top end due to speeds required to get there but I have no doubt this is as fast if not faster than most super bikes. Handling felt fine. No nervousness. It wasn't really setup for my weight or riding preferences and the tires were kind of squared off yet the bike felt stable. The bike has multi-way tunable traction control. Of course I did not test it, but it is good to know that there is some level of stupidity control
Biggest irritant was the fuelling issue. The on-off throttle response was quite twitchy. This is despite having the custom map. I really couldn't find a smooth off to on transition in any gear. This could be an issue if you were to ride on the track and getting back on the throttle. Once you are past 5k rpm it felt nice and flat. Not sure a stock bike would do that. Remember the bike has a full system exhaust with power commander and custom map. That’s at least another $3000. I would have expected better response. The quick shifter did not want to work right. Not sure if it wasn’t installed properly or what the deal was. It is after market (I believe).
The instrument console has a lot of info in there. I am still not a big fan of the digital tachometer (bar graph) but to be fair I haven't spent any time on it so maybe one will get used to the display.
This bike does not like going slow. In stop and go traffic, the bike was getting hot.. This was in ~70F weather. I can only imagine what it would do if the ambient was about 90F??
Overall, buy it if you need to stand out in the crowd. Is it worth the 18k+ new? Not to me. It is a gorgeous bike and does make the ownership special. No question at all. Is it the performance bang for the buck? Nope.
Word on the street is that these bikes are very reliable. Only exception being if you need parts, then you may end up waiting for a long time to get stuff from Italy. I am not a huge fan of 7500miles valve check either.
I was very serious about buying this one but as of now, I am out. Someday I might pick one up just for the heck of owning one.
Hope this does not paint a negative picture. This bike like any other comes with it’s own advantages and disadvantages.