FROM silicone or similar chemical-based conditioning TO oil-based conditioning
There will likely be an adjustment period.  During this period, your hair will not have the same slippery and silky feel caused by the silicone or chemical coating.  Depending on the individual, it would take around 5 – 8 rounds for the layer of silicone coating to come off the hair.  You may also experience more tangling and have an unusual feeling.  Over time, your hair will become lighter and softer.  Moreover, as you are conditioning your hair primarily with natural oil, the hair strand will likely become healthier and resume its own natural shine and smoothness.   

FROM rinse-off TO leave-in conditioner 
ShamLulu is a leave-in conditioner.  Only a small amount is required as compared to any rinse-off conditioner because most of that was actually rinsed away.
For rinse-off conditioners, users never really know how much conditioning they needed or used.  But for leave-in, users have full control.  With that, users first need to test and find out the actually amount they need.  This may take a period of time.  The actual amount required will depend on the hair texture, length, user expectation, hair drying method, weather etc.  After that, the user will be in control and can adjust the amount needed for different environments.  For example, you want to apply more during cold and dry weather, and you can fully control that.