Yesterday I went for a run in an area that had better Pokemon spawning, and when I used 2 incenses back to back, I got a good bit of Pokemon. Dratini, Eevees, Gastly, Drowsee and more. I find it funny a Dratini was incensed spawned where a actual Dratini was. The incense one ran away sadly, but did get the natural spawn one. Also caught so many Magikarps, increased my candy by 50 in just an hour of running.
Only downside to where I was, is that there are a lot fewer Pokestops. On my main run for 30 min in 1 direction and then 30 min back, prob only hit 8 Pokestops max. While an hour run at my normal part of the trail would hit me like 20, but have a lot less Pokemon around.
On the plus side, the beginning of it at a park where you park has like 6 all next to each other (not counting this in my stat above)