I've got an Octopus and just got an IGO-L and AGI. For whatever reason so far I've had the best performance out of my Octopus, but I haven't had the other long enough to judge. The IGo- L and AGI are extremely similar. I haven't used my AGI in tank mode yet but I like this thing already. My only major problem with them is they leak a lot if you over drip and make a mess. Also has anyone tried mesh wick on a rebuildable atomizer? I've got some pre oxidized mesh thats a little to short for my tanks.