I have been running nanos for a few yrs. evap./ temp/salinity changes are a given. I have found that a slightly more "techy" nano ei; controller, auto top off etc. will help a lot. However, diligent husbandry and WC's can control parameters easily too. Keep tabs on livestock and steer clear of frozen foods.
On the plus, small costs! Less lighting, less powerful pumps and skimmers etc. maintenance costs stay under 300-400$/yr and quite frankly, bigger systems never appealed to me from the start and still I prefer nanos!
IMO, if an lfs promotes a 10 gallon starter system, they should at least tell the newb that its the daily maintenance that is the biggest challenge.
If ur slightly OCD about a clean and maintained tiny tank, nanos r for you!
My two cents.
