I have had my nano for an awesome 3-4 months, during which it has seen all sorts of use from all kinds of people. My E-nano (named, Flos) is easily one of the best purchases I have ever made. I had a bit of trouble at the beginning with power output (Which I determined was the shitty place I am living as 7.5 in my room was about a 6 at my friend's house). You can even get great sessions out of this baby as it warms up (Not as powerful obviously, but still light cloud production.
At my other friend's house, he doesn't like the smell, so I set it up in the bathroom, take a quick shower and Flos is ready to go. Sometimes I set it up while I am on the toilet, setting it to 10, and by the time I am done I get steadily increasing power throughout the stem.
Also, rather recently I got my hands on some oil, and boy, does the nano shine with some oil. Efficient and the taste. Just wow.
Finally considering getting a water tool to get the other side of the nano (bought the GonG when I first ordered my nano), and under
@ataxian 's suggestions will likely get the d022 (with a small question being, how well balanced is said water pipe, I.E., is it easy to knock over? if so, I might consider another piece)