I wouldn't trust that brand only because they do not seem to understand outdoor garment terminology too well.
Usually a softshell is not made with a waterproof fabric but instead uses something more breathable but highly water resistant. It just seems like they sell products aimed at people wanting to buy into an image more than providing products focused on performance and value.
For comparison look at this adidas softshell at REI:
$80 MSRP (cheaper on closeout with member discounts), weighs less than 600gm (which should be a standard for most softshells, anything heavier will probably be way too warm or stifling for 90% of usage).
Also if you peruse this site you'll find many people forgo softshells while actually hiking. They are limited in their versatility. Not quite warm enough to really be an insulation layer, not quite water resistant enough to provide storm protection, and generally heavy and bulky for what they offer.
You'll probably be better served by a more traditional setup of a cheap and light windshirt (departmentofgoods.com often has a $30 2.5oz stoic wraith windshirt), a warm generic fleece for warmth (or a synthetic/down puffy for more $$$) and a cheap but effective WPB shell like a driducks, tyvek MYOG, or a poncho tarp setup for storm protection. Those three items can often be found for the same weight as the softshell you linked but with more warmth, less rain, and better breathability in the long term.