Whats your favorite all time favorite prefilled cartridges? Below is my list. Brass Knuckles Heavy Hitters Amber Industries Hmbldt Lucky vape cartridges I always wanted to try Alpine vapor, those look very good. Strength wise Brass Knuckle is the strongest this is why I choose them. They have issues with quality control. I have seen on https://dabconnection.com/reviews/brass-knuckles-vape-pen/ they tested for pesticides which isn't good but they are also tested clean on sclabs.com. I believe you can taste the difference right away because I had to return some Brass knuckle cartridges because they tasted horrible, extremely bitter. This was perhaps the pesticides? However most of the time my experience with Brass knuckles has been great. Heavy Hitters is amazing. They have a 2.2g cart I tried that was strong and tasty. Amber industires is fractionally distilled which allows for a very clean strong vape. Hmbldt is great. Extremely nice vape pens, strong, and accurate. Lucky vapes taste the best and is very strong.