My Surface Pro 4 came in today, so i can give you a good opinion. honestly, if youre looking to replace a tablet, get a tablet. the surface is trying to be more than a tablet. not to mention the almost required keyboard doesnt come with it which is an extra 150 EUR (for me).
if youre looking to actually use it for e.g school, then do so. it master that bit. as an artist and a 3D modeler, this thing is all i could ever wish for.