I tried these tablets on a recent jungle trip. I already had a heavy load, so the tablets saved me from carrying the filter... Or so I thought. I was very happy with the tablets, except for the fact that the wrapping says to wait 4 hours before drinking the water. I had thought it only took about 30 minutes, but not wanting to risk it, I waited the 4 hours every time. This was a pain because it meant carrying an extra bottle for the water to treat, which of course weighted more than the filter would have. I later found out that the 4 hour treatment is for very filthy water. So, the confusing label on the wrapping is responsible for me hauling that extra liter every day. The manufacturer should be more specific with the instructions. As far as taste is concerned I found them excellent.