I've owned my Kizashi from new - brand new, not a demo. From day 1 shifting into 2nd gear was never 100%. Early on the dealer changed the transmission fluid which improved things a bit - but didn't fix it.
Fast forward over two years and nearly 10000km later




The difference is amazing. I can now floor it in 1st and change into 2nd as fast as I want - it goes in smoothly with no hesitation or noise. The clutch action has also changed with the take up point closer to the floor. The gear lever even seem lighter in it's action.
A word of warning - when bleeding the clutch (two person job) the pedal will stay on the floor when the fluid is released from the bleed valve. Don't panic, simply close the bleed valve and then lift the clutch pedal off the floor - it will then work as normal.

Basic clutch bleeding instructions are here: http://www.kizashiclub.com/forum/viewto ... 182#p23182
PS: I'd highly recommend removing the air filter box for access - it will make life so much easier and will minimise the risk of spilling corrosive brake fluid.