Is there a middle? I can't say I love it after almost 3 weeks, but I certainly don't hate it. I like it.
Pros: Great batteries, tanks are super convenient.
Not good or bad: Decent flavor/TH/VP with LR atty. Cooler smoke with regular atty for less pain throat/chest for chain vaping.
Cons: Finicky bugger, requires constant maintenance (blow out atty, clean tube, etc to avoid leaking). Even with LR, not the best TH/flavor/VP. You will still need a drip setup to try out juices, as the tanks are big and need to be about half filled at least to work well. I'm using a 306 LR on an ego battery for this.
Recommendation: Overall I like it. Getting into a routine with it, in terms of blowing it out and doing all the little tips and tricks, I haven't had a leak since my first week with it. However, I am going to try a 510-t for my out and about atty setup. Less convenient tanks (.5 vs 1.1 or 2ml) but reported to do better on leaking and flavor/TH/VP. If this pans out, I will probably switch atty systems and use ego batts and with a cone cover.
IMO, tanks rule for convenience and economy and ego battery is a winner. No wasted juice, no throwing away something that is not cheap (like cartos). Tanks are small and super easy to store a few of in your pocket (I use a coin pouch). The battery can last almost all day (1000mah) no problem.
Edit: As a bonus, if you like the ego batteries, you can consider an ego booster for an easy, compact VV mod.