I went to Peak Performance in NYC, a gym that has an InBody 520 machine.  (Printout Attached)It's far more accurate than calipers, and the sheet it prints out with the breakdown is helpful.  Even with the margin of error as long as I get my bf done on this machine next time at least I have a consistent metric to compare.  I say it's worth it for sure.

Same thing my gym has as well there is a few rules you have to follow to ensure accuracy though did your gym tell you them?

No. What % of error do the results increase by in the absence of these steps?

Huge man, the basic ones are no food 2 hours before, no liquid 1 hour before, don't have any caffeine within 12 hours, no exercise within 4 hours and don't go to the bathroom before. it works by shooting electric pulses through your body the electricity returns faster when you have more fat rather than muscle and it establishes your BF based on this. All the things above affect the water in your body greatly and will effect the results greatly. Did they charge you man?

Oh yes...that. I thought you meant during the test. Here are the guidelines they gave me, though they differ from yours:No alcohol within 24 hours No caffeine day of testing No food within 4 hours No exercise prior to testing 16oz of water within 1-2 hours prior to testing