Well, I'm bringing this back to the top again as promised. I just got back from Taiwan today at 0230 hrs. My experience with the Frontier Pro was very positive. I used it much like the fellow in the video with a bladder and gravity dripped water into a water bottle for the week.
The filter worked great and I was able to fill a water bottle in about 30 seconds even with the pre-filter inside. Fairly quick rate IMO. I used the filter/bladder setup the first 3 days with tablets to kill any other nasties because most people in Taiwan use cisterns, plus their plumbing is very, very old. I was not sure if they filtered the water from the cisterns, but I found out later(more on that). I also used it like a straw for tap water out of a glass and it worked very well. I did that without tablets just to try it out, and I remained healthy.
The last day, just a couple of hours before my flight, I decided to test myself because, as I said before, I am very sensitive to water when I travel. I can eat just about anything and be fine (and believe me, I ate some strange things on this stay), but the water has gotten me every single time. So, we went to a small cafe in Taichung where they served us water in a glass and placed a green bottle on the table to refill when we liked. I noticed a cistern on the top of the place when we went in, so I was pretty sure this would be a good test. I finished my small glass of water and refilled from the larger green bottle and noticed all kinds of "sea monkeys' floating around after doing so. I gulped it down. Well, today around 9 in the morning, the "sea monkeys" were doing their thing. Been pretty steady since, but not too terrible; nothing like giardia, but enough to validate the little system for me.
On a side note, the filter fit bottles in the hotel in Taipei, but interestingly enough, it didn't fit the bottles in Taichung.
All in all, it is a great travel filter IMO, and though I didn't use it in a hiking situation, I'm confident I would be able to use it for that with no problem.
