Best Tablet for Engineers

I already have a PC and a laptop for things like MATLAB and CAD, but I was looking for a good tablet that isn’t to expensive and is easily portable. Does anyone have a suggestion. Preferably not apple.

You already have a laptop, but we got our ChemE daughter a Lenovo Yoga 900 series convertible that she seems to like.

What are you planning on using the tablet for? Most engineering work is too heavy duty for a tablet.