Here's my complete versus list so far:
Filling
Tanks: bring out the pipette or syringe (I stopped popping off the tank caps because, if you look closely at the tank lip, mine at least, are getting worn down. I did buy more tanks to cycle through but...pop off the dropper from the juice bottle, pipe or syringe fill. Either have dedicated pipettes/syringes for each flavor of juice, or rinse the only one I have between juices. Repeat for other flavors. Done.
Go-carts: pry up/off the rubber mouthpiece end cap, drip drops until full. Repeat for other flavors/carts. Done.
Cleaning:
Attys/Tanks: <takes deep breath> blow out juice, boil water or get PGA or IPA, wash, swish, blow, dry-burn, compressed air, oven on low, air dry, etc. IPA the tanks, (but have to remove the end caps to allow cleaning inside, use wet burn method (easy but really clean?), just blow through, hope for the best...etc.
Go-carts:: <sorry no data here yet, I may try to clean them, I may not...going to try to get a month out of one set, then likely toss for a new set -- $20.00 per month might be reasonable here for me, but might try cleaning as well...must study>
Capacity
Tanks: 1 tank every 6 hours
Go-carts: 1 fill every 12 hours
Flavor drift
eGo-t: must be absolutely clean, drip 2 - 3 drops into the battery end to saturate the coil/mesh and let sit, prior flavor will (if present), translate into new flavor "after a while".
Go-Go: N/A, just use 1 flavor per cart. (I obviously have a method here that might be unfair, but I'll only use one flavor per cart, but have been reading on cleaning the carts to switch as necessary. One could do this with eGo-t attys but the cost...).
Battery life:
eGo-t: (although I only had 650 mAh), usage was about 24 hours.
Go-Go: about 48 hours.
Consistency:
eGo-t: just really none from one hit to the next. I'll suddenly get it vaping properly, then it will seem to not be wicking, couple of draw pulls, but the dry hits, burnt flavor hits, no flavor hits, just too many in between the good. A full tank seems not to taste as good as a half to close to empty tank for some reason. I really believe the flavor and performance are lacking due to the condensation problem (remove the mouthpiece baffles to reduce this) and wicking challenges.
Go-Go: really airy, slow draws produce extreme flavor and vapor every draw, from full to almost "empty"....although not being able to see the level of fluid is a drag compared to the tank (gonna miss that), I've been adding about 20 drops every 12 hours or so. (Note here: I'm REALLY switching between flavors constantly, everything tastes so good on this device, and so all 5 carts are getting used fairly evenly.
Size
eGo-t: just about the perfect size (for me).
Go-Go: too big? I don't care. It's big; it lasts, and lasts, and lasts. Both units fit my eGo case as well as the carts, with no leaking.
Theorycrafting here: We have the posters here greyrat, les, terryuk, myself etc. as well as SSV2 (very much looking forward to your review) and heavy hitters GrimmGreen and DonDaBoomVape...on board with this item, but seems we really need to get some more attention to it; people like Elendil, Katya, etc like they are on the eGo-t topics to try these... must catch on to stay in production/support?