I have been using one for the last 3 months. I think it works the best with an inline filter other than that I don't see a benefit for having a pressurized bladder for hunting/hiking. I would not recommend the geigerrig filter as I only got about 20 gallons of water through it before it stopped working. The sawyer filter has much better flow to the point I only need to pressurize the bag after a couple of days of filtering less than pristine water. Also the sawyer is set up to be back flushed and advertised to work for a million gallons. I wont be trading my geigerrig bladder in anytime soon just because of the ease of use with an inline filter.