I can not agree. Sure, who would invest at face value, can all have a little bit faster, but really need not to do it. If you want to hatch a dinosaur, the loose needs later 12 hours, and more, simply leave it over night. Logically, are buildings, ornaments and Dinos with the progress expensive: but you deserve more.
I brought it in one week to Lvl 20 (including 18 in the normal Dinos Park - ausgelevelt partly -. And a couple in the aqua and Ice Age Park) - without investing. With the Dino fights you get a lot of coal and raw materials, for which you can then in turn can upgrade Dinos. And it is quite possible to spend hours dealing straight. After a few Dino fighting the small buildings are again full of money and can be "harvested", then fight again, feeding animals, etc. and already the Dinos are again ready to fight.
Who can apply no patience and want to invest any time, will not have much joy of the game, because of course nothing much happens. Who want to play extensively, which can do with this game. Therefore I also full 5 stars.