Assuming that the weight is correct and the price will compete with the Sawyer Squeeze and the Befree, I can see how the Platy filter can have some value, especially for the thru-hiker. In case of destruction of your water bladder, you can easily put up a compatible 28mm bottle in the next town.
Having used a SW bottle with a Sawyer Squeeze, I didn’t find letting air in or squeezing the bottle to be a major issue. The SW bottle is long and narrow, so the structure is mostly at the ends. The bottle itself recovers pretty well from being squeezed. And I found the bottles to be a lot more durable than the bags that come with the Sawyer. My big issue with the Sawyer was the flow rate.
Currently, I’m using the Befree. The flow rate has been great. Especially since I picked up the tip in this forum to run some distilled water through the filter after a trip.
But I agree with Jenny. After a while, filters with hollow fiber tubes clog and need to be replaced.
I haven’t found the open clean end of the Befree to be an issue. While I’m hiking, I just unscrew the filter, dip the Befree bottle into a water source, screw the filter back on, and drink directly from the bottle. Very quick and easy. For camp use, I’ll tote a 1l platy as well as the Befree bottle, both filled with untreated water . When I use up the water in the Befree bottle, I’ll dump the water in the platy into it.
My issue with the Befree is that of compatibility with few water bottles/bladders. The HydraPak bottles are not transparent, which is a deal breaker for me. I have the compatible CNOC 2l bladder, which I like, but at 3 oz even on my scale, it’s relatively porky. None of this would be a big deal if the Befree bottles were sturdier. The .6l version sprung a leak in my first few weeks of using it. So far, the 1l version is doing OK, but I’m being far more careful with it. If the bottles were available without the filter and at a reasonable price, I’d be a happier camper.
What the Befree has going for it is the weight, 1.2 oz dry weight of the filter and 1 oz for the 1l bladder.
The Platy filter is 1.4 oz heavier for the filter and bladder. Is it worth it? Hard to say right now. I most likely won’t be the guinea pig for this one, but I’ll be keeping a close eye on reviews from the field.