I have bought several styles of tanks. and I personally like the aspire nautilus. they are big, hold 5 mils of juice. like any tank......and I do mean any tank ...they require some experience and a few lessons to be learned. with the nautilus, you have to tighten the coil to the base and then just tighten the sleeve finger tight to the base with the coil in it. for people having gurgling issues...they are either over tightening their tank, or pulling too hard while vamping. have to remember the mod/vaporizer does the work. all mods require you pull lightly, and always tighten your tank to the mod just tight enough to make the connection. when you over tighten you push the firing pin into the bottom of the coil and creates a problem while vaping.
as said tho, you have to buy and see what works best for you. the manger and aspire tanks are all good tanks. I would recommend going with one or the other in the end, so you can buy the same coils for all your tanks. and honestly my nautilus coils last me 9-14 days each. it is all about learning and treating your equipment right to get the most out of it. as is anything you buy. like keeping the oil changed in your car. lol