When accelerating from a stop the transmission judders and or slips?

Yep, they had a problem with these transmissions, but you may be able to save it with a fluid change. You must use the CVT transmission fluid which I will list below. Also, is the check engine light on? If so, you may have an input shaft speed sensor that is going bad.

This guide can help:

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

Fluid Types

Fluid Type .................... MITSUBISHI genuine ATF SP-III

This guide can help walk you through the steps as well:

https://www.2carpros.com/articles/how-to-service-an-automatic-transmission

Check out the images (below). Please upload pictures or videos in your response of any problems so we can see what to help you with.