Edge is a British brand, mixed at its own UK facility with every flavour TPD tested and MHRA notified. The supermarket distribution is the tell: chains do not shelve liquids without serious compliance paperwork behind them.
The Core Range and Bar Salts are 50/50 blends, happy in any pod kit, vape pen or starter tank. That universality is a big part of why the brand became a corner-shop staple.
Core Range for classic freebase vaping with a firmer throat hit and the £2.99 price. Bar Salts if you are coming off disposables and want sweeter profiles with the fast, smooth delivery of nicotine salt. The flavours barely overlap, so plenty of people run both.
For everyday vaping, genuinely yes. The recipes are simple rather than layered, which is what most people want at refill number two hundred, and the low sweetener content is kind to coils. It shares that virtue with 88Vape at the budget end of our wall.