I have had a 2014 FZ09 for about a year now. It is hard to help you make that decision since I don't know you. I know that 3 years ago, I wasn't ready to own this type of bike, I was into the Superbike/sport and felt that I needed to have a sports bike, but now I see what a waste it is to have one when the most I do is commute and long road trips, for others is different so it isn't really about the bike but more about where you are on your riding "life"
Let me tell you about the bike:
The good:
- The most fun I have had in 2 wheels (except for racing of course) - the engine characteristics, the torque is just amazing - I still giggle every time I ride the bike and look forward to it every day, this was no longer the case with my GSXR750 or 1000.
- Seating position is awesome - you are very upright like in a supermoto or dirt bike and are able to really see the traffic around you, excellent commuter and fantastic seating position.
- Plenty of after market parts to make the bike your own and replace some of the shortfalls
In short, a fantastic city fun bike that won't break your back while commuting a great bike for long trips
The Bad:
The Seat: It was fine for like a month and then I started getting a wedgy every time I rode, a huge pain in the *** for me, more like pain in my balls to be honest so I had to replace it - many aftermarket choices and do it yourself fixes, I went with a corbin, expensive but worth it since like I said I ride long trips.
The suspension: The rear shock is garbage depending of your weight, you can adjust it a bit and make it better but it is what it is. I replaced mine with a $50 zx6r shock (plentt of how to guides on the FZ09.org forum) and that cheap mod made it completely better.
The front forks are soft but with some adjustment you can make it a lot better without spending any money, I put heavier springs on mine and changed the oil for from a 5 to a 7.5 (about 150 in parts).
So yes it has shorts falls but there is something on it you won't find in any other bike specially t that price range, the loads of fun that bike is to ride.
Again, if what you want is pose and have the latest best sport bike then this is not the bike for you, if you want a solid fast fun versatile bike this is the bike for you.
I know a few people that got it and sold it because there were not into the type of bike and went back to super sport bikes.
Hope this helps, I would say if you can test ride one.
Oh and the jerky throttle thing is not that bad and to be honest one of the favorite things about this bike, just make sure the bike has the 2015 map on it which can be done at an yamaha dealer for free.