Uh... no... the Geekvape 521 allows for build 'n' burn, too. The difference is in the accessories which most folks never use. I have used, but do not yet own the Geekvape 521 Tab, and, honestly, the only con I have... it's s bit of a fingerprint magnet.Both are nice units, but only the coil master lets you build and burn in coils, that's the $20 difference in price. I'm planning to get the coil master 521 over the Geekvape.
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