Anurag,
I also own a 180rx and have in fact got 2 hours run time on mine already. I am the other user that Mark refers to and we have been conversing offline. My experience is exactly the same as Marks, in that its simple to install, it starts and runs beautifully but the spool up time from idle is 'not good'. It reminds me of the original P120/P80's from back when I started flying turbines in 2000/2001.
I do believe Jetcat will act on our comments and resolve the issue but the clock is ticking. I was planning on upgrading my second P160sx to a P180 but I am holding fire until I see some resolution from Jetcat.
In the meantime, I will continue to fly mine in my Ultra Lightning as the extra power over the P160sx is fun and I am just relearning to use a manual idle up(i.e don't close the throttle all the way if you want it to spool up quickly)
Geoff.