The modular design is interesting, it appears to be an inline immersable filter that can connect through a tube to a bottle, bladder, or faucet.

It may be a good choice if it is mainly being used as a gravity filter or with a faucet, but I think the lack of a pump is a disadvantage. In my experience, using a bottle type filter causes you to drink less water, due to the effort it takes to squeeze water through. With this system you can't quickly fill a number of containers with water, unless you have access to a working faucet with sufficient pressure.

I personally think a reliable, field-cleanable, pump type filter, such as the MSR waterworks or the time tested katadyne pocket, is more versatile and useful for many situations.