Ninjatrader realistic fills?

Hi there, I would like to test my automated strategy in live sim with Ninjatrader. I am just wondering how accurate the live sim order engine is in Ninjatrader? Particularly, with limit orders.

Specifically I am interested in finding out what % of my limit orders are likely to fill on the touch, without penetrating.

Ninjatrader describes their own simulation engine as follows:

"The simulation engine is not a simple algorithm that fills your order once the market trades at your order price. The engine uses a scientific approach to determine fill probability by including a number of variables including: ask/bid volume, trade volume, time (to simulate order queue position), and random time delays for switching between order states."

Will live sim give me a good idea?

Thanks, Erfan.