I am the happy owner of (among many others) 2 mvp 2.0's and a cana30 from elev8. As box mods go, they are sturdy. The mvp's have a fail insulator that compresses in the 510 connector over time, but a very tiny oring can revive them if inserted properly. Yet, that no replaceable battery bit really worries me, so I waitlisted for the cana. I'm happy that I did! While it won't take an ego topper, it will take all the 510 that I have, and performs very well with anything I give it to wear. I expect we will see size fluctuations in box mods of this type in the future, so the fact that it is bigger than the mvp by a smidge does not bother me.
Had a mini nautilus shipped to me last week, complete with two vertical coil units. This little guy works beautifully with everything I've thrown at it, on any battery source from baby size ego to the cana. ATM it's sitting atop an mvp, as the testing migration continues. That new bottom vertical coil unit is SWEET!!! While I do love my kayfun, it has its share of drama from time to time, and it is nice on the go to be able to toss a new coil unit in if there is coil/wick to be dealt with. Another mini nautilus will be joining the family here for our upcoming road trip.
Yes, I'd like to have an REO in the collection. Nope, not in a big hurry, which is good, cause weeping finances abound.