When I read those descriptions about how long things are meant to last, I just know that isn't going to be true for me simply because of how much I vape.
I'm a chain vaper and I'm hard on cartomizers, I really am. Plus I have had zero success in cleaning & re-using them. This has been true of Wow cartos, tank cartos and now Smileos.
I use 4 smileos at once; 2 with my daytime juice, 2 with my evening juice. So far I'm finding they last around 1-2 weeks each. If I can get more than a week out of any of them I am happy because that's a heck of a lot longer than Wow cartos (single use only & toss) and tank cartos (3-5 days).
I give Smileomizers a good review, because this is true for me. You might find something else works better for you.