Not what I was expecting...so I was let down. :( I had no knowledge of any backstory (such that it could be a spin-off, based on some other property, or that it could have be an original concept), so my first impression was strictly from the title, "Tom Swift."
Because of "Tom," it reminded me of the "Tom Strong" comic books. A science hero, like Doc Savage or Buck Rogers or Flash Gordon or Adam Strange. In those stories, "Tom Strong" is a strong, confident scientist/adventurer, surrounded by equally-abled family and friends, solving mysteries, and always leaving the world in better state. This is what I thought this show would be.
Alas, except for being a science hero and being surrounded by equally-abled family and friends, Tom Swift is an unlikable, arrogant genius...maybe best described as self-centred and douchey, a spoiled prince. And the rest of show seems to happily support this view of the central hero, and revolve successfully around him, and this is probably the most unbelievable and undesirable aspect.
In the end, I don't care about him, nor his reasons for doing what he does. So why watch?
...now if it actually had been based on the "Tom Strong" comic books....