I have been using a Plato as my daily vale for 3 months. The Plato is excellent but it does have some minor flaws.
This is what I don't like about it.
No pass through vaping. You can charge it through USB but you can't vape when it plugged in.
No RTA option.
It makes a high pitched beeeep when you hit the fire button. It's not very loud but you can hear it. I noticed it more when I started using the 0.4 ohm coils. Now that I am used to the sound it does not bother me but at first it's annoying.
I would like a tiny bit more airflow when it's set to wide open.
Thats it for the bad, now this is what I LOVE about it.
It's ridiculously small and compact, it's very pocket friendly and feels great in my hand. It's small enough that I can wrap my hand around it and no one can see it in my hand. The only thing visible is the drip tip. It really is the ultimate stealth vape. You can get smaller set ups but they do not have the batter life or 5ml juice capacity.
Refilling is simple but make sure you lay the mod on its back (fire button dow) and open both holes. If you only open the one hole you will flood the coil.
NO LEAKS! My Plato has not leaked a single drop of juice since I have started using it. The only time it leaked is when I filled it for the first time and I did not open the bottom hole and I flooded the coil.
The 0.4 ohm coils are a little expensive but they are hands down the best pre-made coils I have tried and they are worth every penny. The flavor and vapour production is excellent. Coil life is incredible! I can not stress this enough, one 0.4 ohm coils last me 2 to 3 weeks, yes WEEKS not days. I only vape clear juice at 30 watts so your mileage may vary. An RTA would be nice but these coils last so long and taste so good I don't really need an RTA.
The Plato is not perfect but for me the positives out way the negatives and I would buy another one in a heartbeat just for the coil life alone.
I have not tried the Cupti but it's looks like a great mod too. I really like the option of being able to use a separate tank with it.
I hope this helps.