Thanks for responding. They sell OTC a brand called Logic at every convenience store in the US. This worked temporarily as I quit cigarettes in January but needed something better. The Phix was available at a local Vaping store so that was next. I will start reading here and find what will be for the future.
Logic in the UK is Japan tobacco. They used to hold the UK record (possibly the world record) for the worst-value refills. If they are the same (might not be) then you did well to escape them.
Unless you fill a tank with a Logic product, you could easily spend $3000 a year on refills.
A vaping store that sells Phix or Juul isn't interested so much in vaping, and certainly not the 'open world' of exciting products and fair running costs.
The history of the products is difficult to understand but when you do, it's easy to see what happened and will happen.
Early products (cartomizer e-cigs) exemplified by brands such as Whitecloud, V2, Greensmoke, Halo took very cheap products and maxed out the profit. They enabled people to unwittingly spend up to five times the necessary money to vape and the products were dreadful and ineffective.
Along came independent stores, juice companies, selling of refillable tanks and clever batteries which reduced the price massively and allowed/helped people to quit smoking with better nicotine delivery and cheaper running costs. That followed the logical progression to bigger everything, more power, more liquid.
Recently, the 'theory' of selling closed-system products has risen again but charging insane prices on the back of a USP mostly based on extraordinarily high nicotine content. The tobacco companies also tried this tactic. They failed to an extent. Juul and Phix don't plan to fail... it's quite hard to fail when you charge such unconscionable amounts of money for what is, after all, just another vape device.
..and just as with any other 'brand' product in the e-cig world (US/UK brands as opposed to Chinese manufacturers) there will loads of review sites convincing you...by the time you've read all the amazing reviews you will believe every word. You will spend $119 on a $29 e-cig. Only later will you realize you were tricked.
I spent $800 before I worked out I had bought less than $100 of hardware.