Board Thread:General Discussion/@comment-26838897-20150807221600/@comment-26839454-20150808003654

Maximum mine is definitely helpful for early game, but since you can only have one Maximum Mine/game, Not too great. It is nice though, since if you're just racking up diamonds when waiting for the next update it acts almost as if you had an extra three mines. Haven't gotten extra breeder or nursery before, but Nursery #2 definitely seems more helpful. Then if you get the wrong result, you can keep going. Of course, getting both is nice for if you want to breed for ethereals and limiteds at the same time :)