They listened well to what i did not want/what i already owned, I bought the $50 and later looked up each species i got to see i got $101 worth of critters!. defiantly worth it if you just dont know what you want to get, my only complaint is, yes. people should be prepared for anything, but it would be nice to get a note before the package arrives to explain what size enclosures you will need and basic needs of the mystery critters, as i had to go shopping the day they arrived. Though that one complaint is not worthy of losing a star, overall great idea! if i ever have room for more ill defiantly get this again !