This is not long term at all. It gives the extra protein and fat if a baby is thin. It is only meant to be a boost in nutrition. The added vitamins makes up for the lack of calcium and other nutrients from not having an entire body with bones and organs. It will not lead to a dead monitor. No I do not own one but I posted after another member stated that he believed there were not many CB out there, about a friend that just had a very fat and healthy clutch of savs. It is not their first clutch either. I dont claim to be an expert and no I dont own one but this is also advice that some exotics vets would give to boost an undernourished baby. So to the OP, be aware that ground beef is not a long term staple food for sav's but it is known by some people to help with poor nutrition and can be offered as a treat occasionally. Oh and the beef will help with dehydration from the inside as crickets do not contain much water.
Remember that what was wrong yesterday or unknown, may be right and positive info today.