Rating: 5 / 5
Built a Jason Klass inspired DIY gravity filter but replaced the FrontierPro with the MSR/Platy gravity filter. The MSR/Platy filters down to a finer level and at a magnitude faster rate.
Over a 26 day period filtered +3L per day of clear looking water. By day 20 noticed a slight slowing of the filtration rate. Maybe a minute slower per 2L. The filter unit seems rugged. The soft rubberized armored shell should absorb minor impacts. Would gladly give up the armor for a lighter filter. Hopefully MSR will consider a light weight version.
The ~$40 cost makes this filter relatively inexpensive. No real maintenance except an occasional back flush with clean water and no moving parts to wear or break makes this filter less prone to failure. Trying to filter mud water, freezing or real hard impact are probably the only sources for failure. SteriPen came out with a bottle adapter, 3 micron prefilter that fits almost all container openings. Prefiltering the gunk out of the water based on the above review is probably a necessity. If your water source is going to contain real fine particulate matter that a prefilter will not deal with this may not be a good choice of a water filter.