I would suggest the tablets for convenience. Do the research and read the fine print on this and any other system.
What I use is a Sawyer Squeeze http://www.amazon.com/Sawyer-Products-SP181-Filtration-Squeezable/dp/B004TZ86M6/ref=sr_1_1?ie=UTF8&qid=1427646558&sr=8-1&keywords=sawyer+point+one+squeeze This is not without it's issues and I have fairly clean water where I go. Issues I have found are the syringe for back flushing I replaced with a tornado tube and made aftermarket caps which I cannibalized from water bottles.