Angela, what model are you using?
I counted for the first time lastnight, I got 33 before the flavor started to drop off.
Second time I got around 28.
This was where the FIRST sign of flavor drop off was. I could've (and I usual do) continued to vape for another 20+ hits, but it doesn't have that really "Fresh", "strong" flavor to it, which I love! I should also state that I take very long, big hits (as I'm sure most do). And I smoke my sidesho continuously, like an analog. I don't take breaks inbetween vapes. I pretty much smoke down a whole cart in about 10-20 minutes most of the time. Then I'll do another cart in 30-60min. I haven't seen any hindering of the performance using the sidesho like this. This device really is quite impressive...
I'm still new to this and haven't tried any cart mods, except PTB on one of my carts. I will buying some blue foam today, as that seems to be the consensus of what the best filler is.
I'm using the sidesho, which I absolutely love! The vapor is big and thick! The inner cart is big, and I'm able to get 10+ drops in there with no leakage (pooling) issues! Getting all of that wick is another story, but I'm hoping with the blue foam mod, that will improve!