Andy, the local stuff does the job and the taste doesn't bother. But it might be bit of a surpise to someone who first tries it. BTW, I recently started my own Aloe garden. And since my need to drink the stuff has declined I should be able to grow enough.
If anyone has heartburn and wants to give it a go, I drink about 4 oz and it works pretty fast. The less expensive stuff that I buy is ~100% but contains Sodium Benzoate as a preservative. My wife gives me a hard time because there is science that indicates it can change into benzene, which is a carcinogen.
Here's the stuff...