I've used them all and the Vision is easily the best carto. They dont leak, don't spit out hot juice on your tongue, they are very quick and easy to refill straight from the bottle (just slide the mouth piece off and pour), they perform great, good flavor and vapor, can last months if clear juice is used, the plastic is extremely strong, and the airflow is adjustable.
The only problems I've faced are:
- The largest size (3.5ml) tends to flood the coil intermittently, the smaller sizes are fine.
- The mouth piece is a bit too big in my opinion but you can cut 5mm's off using pliers if needed.
- The wires can stretch and break if you turn the airflow threading too much so you need to watch the wires when adjusting.
- The inner silicon seal needs to be adjusted out of the box so the small notches are flush with the wick, otherwise they limit the juice flow.
But even with those four issues, they still surpass the CEx, Gx, and other carto's. They are a bit pricy but I think it's worth it, it's a quality carto that has been designed, redesigned, and polished well, and continue to improve all the time.