I've recently tried testing the life of the Echo-E after hearing the claims of "100 refills before tossing" and so far it is doing really well without a single cleaning! I vape 4-5 ml a day and i've been doing that on one echo-e with non-flavored 75%pg/25%vg. I noticed that when I have to refill, i only refill about 1 ml each time and sometimes a bit more, but lets just say 1 ml.
I started this test on Aug. 8th before work and have been using this ONE carto only so doing the math, i've at least refilled it 68 times since i started (excluding today). Not a sign of gunking to be heard! One thing i did notice was that the filling still is white but seems like it is becoming less absorbent so it may need a good rinsing and drying to be good as new but it seems like i wont have to dry burn this carto at all!
Now that it's gone this far, I feel confident in trusing their claims of "100 refills" ONLY...and i really mean ONLY...if it's non-flavored juice. I can't say it'll be the same if it were a pure VG or high VG mix or flavored but if you vape non-flavored and want something that will last between top offs, the echo-e is DEFINITELY worth the money!
Note: I was never a non-flavored vaper before this experiment but after doing this, i've come to enjoy it
Though i still love the flavored stuff, i'll stick to the non-flavored as my "all day" vape 

Note: I was never a non-flavored vaper before this experiment but after doing this, i've come to enjoy it

