I've thought about it. I couldn't decide if Lucky Eggs or Incubators were more useful to buy. The higher the trainer level, the more powerful wild pokemon you run into right?
Both are a pretty good investment, honestly. Incubators for reasons already said and Lucky Eggs for quick leveling up.
Yes, you catch/encounter more powerful wild Pokemon as you level up your trainer level. It is both a blessing a curse.
A blessing when you run into a CP818 Tauros
that runs away
So the incubators you buy are only 3 use incubators? Are they worth it. I have a lot of eggs but it takes a long time to hatch them
I've bought a few and I find them useful. When you get a lot of 5km and 10km eggs, it really helps out. (Let your infinite-use incubator one take care of the 2km eggs.)
The difference could be walking 30km for 3 eggs or walking 10km for 3 eggs.