Vape carts are the most discreet way to dose — no smell that lingers, no grinder, no ash. What separates a good cart from a bad one is the oil inside it: distillate with added terpenes is cheap and consistent, live resin keeps the strain's original terpene profile and tastes dramatically better.
A 510 cartridge screws onto a reusable battery you already own — cheaper per gram and less waste. A disposable is a sealed all-in-one you throw away when it's empty; convenient, but you're rebuying the battery every time. If you vape regularly, buy a good battery once and stick to carts.
Rosin carts (solventless) taste best and cost most. Live resin is close behind at a lower price. Distillate with botanical terpenes is the budget standard — potent, but the flavor is added rather than original.
Store carts upright at room temperature. Cold thickens the oil and causes clogs; heat thins it and causes leaks through the airholes. If a cart clogs, use your battery's preheat rather than a lighter.