I'm on day four with the same carto. It lasts all day and vapor and th are great. Tell me- IS THERE A DEVICE OUT THERE THAT EVERYONE LIKES? I've read about more people liking than disliking.
I've topping it off with the dropper from a glass bottle and getting more juice in. Just put a little in at a timep and put the dropper on the filling and squirt. More pressure than with dripping and less work than filling a syringes for 15 or so drops
To be perfectly Honest Ginagab, I really don't think there is "One" all encompassing device that everyone out there likes. I think this is because being ex-smokers we all have different tastes, which is probably why there are so many different kinds of PV's, to cater to all the different wants and needs of the general populations. Same with the Juices that are out there. For example: So many people Rave about "RY4" being the end all and be all of E-Liquids, Personally I think it tastes like vaping a bottle of Perfume.
I can say this though, I personally do not know what price range you are looking, but I will give you the list of devices I personally use. I call them the "Three Amigos" because they are always with me.
My Provari from Provape.com, over $200 fully decked out the way I have mine with the dual coil 510 XL's in a Stainless Steel Dual Coil MAP Tank. Incredible device, as it should be with the price tag. I get all the TH I can possibly ever want and if I want more I simply increase the voltage until I am satisfied.
My Go Go and Go Go Pro from Cigeasy.com. Runs around $50. It has a 3ml cartomizer and a proprietary threading so nothing but the cartomizers for it will fit this device without an available adapter. I personally do not care about the proprietary threading because the cartomizers for this thing are rock solid and perfectly tuned to what the battery can produce/ I took my Go Go Pro battery off the charger at 6 am on Monday this week and I just put it on the charger this morning, and you can ask anyone that knows me, I am a major chainvaper. The other beautiful thing about this particular device is that if you do decide to use an adapter for other cartos such as 510 or KR 808/901 you can still fit the cone over the top and screw it into place so it doesn't look like some kind of science experiment. For the Price, you simply cannot beat this device.
ETA: I have been on the same box of Go Go Cartomizers for over 4 months now as well, so with a little care and cleaning once in a while these cartos seem to be lasting me a very very long time
My Ego-T 1000mah Batteries, outfitted with Dual Coil Clearomizers and the protective cone. This cone must be modified a little to fit over the clearomizers as they are a fraction larger in diameter than a standard 510 carto. Nothing a little bit of dremel sanding won't take care of for you to sand down the end of the cone until it allows the Clearomizer to pass through it with ease.
Another device I am going to buy is the 808 Elite from Cigeasy, it is the newest KR808D-1 design and not only does it perform extremely well from every review I have seen of it from people I know and trust, it is also one of the most elegant looking PV's I have seen to date.
I do hope this helps you out a bit, but these are my personal favorites and many people will agree they are great and others will not, but for me, they are the Cats Meow
Happy Vaping and have a very wonderful day;
Sincerely;
Nate aka Darth Vapor