I only have one snake, so I don't think I'm hard-core, but I have a scale. LOL
Since it's my first snake, I like being able to check with the Munsen plan as well as the "eyeball plan". Actually, if I was going with just the eyeball plan, my 225 g snake would probably still be on hoppers, since I wouldn't have believed he could take an adult. The scales are not very expensive; under $10 for the regular kitchen scale and about $20 for the nice digital ones. I started out with the regular one, but recently decided to upgrade and I love the digital one because it's so exact.