I still haven't recieved a tester bike from Kawasaki, but I managed to get my hands on one that is being reviewed by Cars, Bikes and Trucks.
 This is not a comprehensive review, just my first impression - because I wasn't able to test it under a variety of conditions and during daily commuting.
 Climbing on top of the bike, I do understand why some people who see the baby Ninja for the first time are a bit dissapointed.The tank is slim - even slimmer than a ZZR-250. It almost feels like an RXZ.
 The handlebars - which are connected to a pair of conventional forks are also very upright - giving you a very unsporting position.
 

The experience is much different from sitting on a Blade 250r - which feels big and sporty compared to the little Ninja.
 However, whatever shortcomings in terms of feel and aesthetics are immediately offset by the revvy and punch little engine.
 It feels exactly like a ZZR-250, except the power delivery is much improved.
 It is a high revving engine, but it feels very smooth.
 If you look at the Ninja in detail, you can't help but feel impressed by the level of quality on the little bike.

This is a beautiful little bike. The styling is sharp and fresh. It's just as good looking as the 2007 ZX-6 and ZX-10. It's way, way better looking than the ER-6F or Ninja 650r. It also looks more refined than the ER-6N.   

The instrumentation is neat. While there are no fancy digital meters - it has a fuel gauge and that to me is already a convenience compared to some bigger sports bikes.
 It feels well built and looks well built.
 The plastics feel expensive, and the fairing is well bolted together.
The bike isn't that small. From most angles, it looks almost as big as it' bigger 600cc brother, the ZX-6. A 5'10'' rider still looks ok riding it, although anyone over 6 feet may want to consider something a bit bigger or risk looking clownish.

However, the first thing I would change would be the tyres.
 The standard 130 rear end doesnt really do justice to the bike.
 I used to have a ZZR-250, and used 150s on the rear.
 The Naza Blade 250 also uses 150 rubber.
 Heck, even the little Mito uses a 150 rear.
 There are those who say that a 130 rear end is good enough for the amount of power the bike makes, but I can't say I can agree with them.
 Tyres are not just used for laying down power - they are also used during braking.

 If 130s were good enough, then how come MotoGP 125s use such wide tyres.
 There's not much contact area on that 130, and it locked up the moment I started riding the bike even a little hard, so maybe  a change to bigger tyres would be on the to do list if you get this bike.