I've been drinking apple cider vinegar with mother for a little over 3 years now every single day. The health benefits are incredible! I couldn't even get into all the ways ACV has changed my life, but one important one is I haven't been sick once since drinking it. I have 2 young children who had a hard time this flu season, and so I started giving it to them as well whenever they seemed to be coming down with something. Knocked out their colds by the end of the day every time. I really just can't say enough about it.
All that said, there are two main brands that I know of. Dynamic Health and Braggs. I used Braggs for about a year and then moved to a part of the country that doesn't have health food stores, so I was forced to get my ACV online. Decided to try Dynamic Health's brand and am so glad I did! The taste and quality is infinitely superior to Braggs. I highly recommend this drink and this brand to absolutely everyone!