Congratulations on your new machine. I have never had a Viking but my sister, who is an expert seamstress, has used one since the 1950's and loves them. She got my mom's viking also when she passed away because hers was finally giving out. She even sews all her own coats, upholstery fabrics, hats, purses, you name it on hers.
The only thing I have been told about the viking and it has nothing to do with the machine is that the new portable bobbin winders do not work for the viking bobbins. This information came to me from a friend who has a viking and so I believe it to be true. If you don't use the "SideWinder" you don't need to worry about it.