Welcome.
Novo is made by Smok. Smok makes nice vape hardware; innovative, fun, stylish products. Their reliability is quite bad, but as they outsell all the other brands, it's hard to say just how bad. If you run a search on problems, you will get more hits than makes sense for even a brand which sells a lot. So - be prepared to buy another, then another.
It is however refillable, which you certainly want.
If you want a Pod, the JustFog minifit is far, far better. Better reliability, probably
Juul? Now Juul is the lowest of the low

(in my opinion) unless you can achieve a few basics.
1. You need to be able/prepared to 'hack' the pods to refill.
2. You need to be able to purchase Nic Salt liquids at higher strength. Possible in America, impossible in Europe.
Purchasing a Juul if you don't intend to refill and use it long-term is the mother of all disasters. Juul aren't in this business to save smokers, just to make money. They have persuaded reviewers and the general non-expert community they sell something that is way, way above everything else on the market. They did it because as it is, out of the box, it is a great product. But you can vape 50mg liquid for 10% of the cost with almost no effort whatsoever. If Juul gets you off the smokes, it's a fine choice. Staying on it long-term is a waste of money and you can vape better, more effectively and have hundreds, maybe thousands of dollars in the bank a year for NOT using Juul.
You can hack Juul pods. If you do, choose Juul, why not? If you don't want to or can't - run away... as fast as you can. Ignore the hype... it's just an e-cig and certainly does not deserve it's own fan-boy-club of losers and patsies.
Please don't feed the Juul monster. Let them fail (eventually) when people realize what a darn rip-off the whole thing is.
Did you know Apple iPhones are finally set to lose market share? - That's because finally, after over a decade, a few people have come to realize their mistake. For some iPhone lovers, it's probably too late to switch as their brains are re-wired. This is what Juul wants... they don't deserve it. Apple did deserve it.
Novo or Juul?
My recommendation = JustFog minifit.
