I had one in my nano tank for a few years. My suggestion is that a nano is perfect for these, would probably not do as well in a tank with a lot of fish etc. as it is a small fish and could get easily spooked. They like to have a little hole to live in and will just dart out to eat, the rest of the time they mostly will stay in there resting place. I used and old cocco worm tube, and it would just hang in there most of the time.
They are pretty attentive and mine would come out of the tube when I came by the tank begging for food. I had mine in the tank with a watchmen goby and pistol shrimp pair, they got along fine as the goby / shrimp pair were always under the rocks in their tunnels, and the Sailfin was in his tube. Might have more problems with another goby like a tailspot which would basically assume the same niche in the tank.