Is this game good? Yes. Should I spend 60 bucks on it? Yes (it takes years for Nintendo to reduce the price of their top-selling franchise games). Will my mind will be blown and I will keep playing for hours until the sun comes out? No
Let me start by saying that despite of what everyone believes, the Mario series are not for everyone, Nintendo has 2 target markets very well identified, children between 6 and 12 and adults like me who grew up playing every single Mario installment until now. Which one is more profitable? the first one hence this game is simple, easy and childish.
Super Mario Odyssey (SMO) lacks of deepness, do not confuse deepness with richness, SMO is rich in content (enemies, hundreds of "moons" to find, which work the same way as the "stars" from Mario 64, Mario character variations, and big open world map levels) but as I said before it lacks of deepness, it has no soul, the storyline is completely linear as in most Mario games (Bowser kidnaps the Princess, Mario goes to the rescue) there is no twist, long are gone the days where Nintendo adventured to more intricate stories (Super Mario RPG for example) they are now set for the money, and a childish, easy to play, linear and no developing storyline is the way to go.
Gameplay is fun but simple, the amount of content makes it difficult to get bored at least on the first run (finishing the game without getting all the moon pieces is easy and fast, 10-15 hours of play) but if you are really up to the challenge of getting every single moon in every single level you will definitety get bored and find yourself trapped in the same repetitive gameplay with not much else to offer and no valuable reward. Since the game is clearly designed for children to play it you will be able to pin point every single moon from any high ground where you can visualize the entire map, even the moons hidden from sight will be easily spotted using very simple geometric logic and intuition.
The chance to use your coins for buying new clothes for Mario is not new (again Mario RPG did it 20 years ago) but is a great addition to SMO however, its only for amusement purposes, the clothes does not modify any of the abilities of Mario, nor will be a decisive factor of beating a boss, creating an strategy or passing a level, you can use the same clothes (or only trouses for that matter) through all the game, through all the weathers and it will not make any major difference).
Sound, graphics, game structure are solid as in any Mario game.
In conclusion, SMO does not offer anything new in respect of gameplay, story or deepness. It will bore you after +15 hours, is a game clearly designed for children and is a painful reminder that Im a grown man, long are gone the days where I could spent hours playing this kind of games and find it entertaining. If you have little kids, buy it for them they will love it, if you don't, buy it to have a break from daily routine and some nostalgic memoirs