I really like the lemo drop, performs great! I would still say that a dual coil build on the billow is better. Lemo is a superior single build though. Waiting for my kayfun v4 ehpro clone to come in to compare the 3. Both lemo and billow leak if on their sides for an extended time, kayfun looks to have fixed that with the juice control shut off. All 3 tanks are fantastic though, can't really go wrong.
I've found that a .9ohm 26ga 2.4mm coil gives me the best performance in the lemo.
No the lemo does not leak if left on it's side, I cary at least one extra in my front pocket at all times and have never had one leak period.
I swap flavors 2-3 times a day and most days have one in each front pocket of my slacks rattling around.