Dittos about not having anyone else quarantine your fish. If they live past the LFS quarantine I would still quarantine them so you KNOW without doubt that they are disease and pest free. The LFS quarantine would not be in vain as you know they lived and ate at least that long. The reason I would not trust a LFS or other peoples quarantine is you are not there to see what is being done. Did they use the same net to feed brine shrimp, the same container for water changes (old and then new water in the same container), taking water from their other systems to start the quarantine, keeping the quarantine tank not separated from their water filtering system or do other things that you would not do. You never know for sure.