User blog comment:Akrie/Cheesecake and Mint Choco. Who's Better?/@comment-27164679-20150410032952/@comment-25889587-20150410033507

It's pretty wise to use Crystals if you like to, since getting 40 out of 44 will take a very long time to unlock with coins, providing you have a decent crystal generating engine that will return the crystals in around 1-2 weeks.