I feel like pressurewound strings like GHS PWs and SIT Silencers are love it/hate it and work better with some basses than others. I've tried both and prefer the Silencers, but they wouldn't be my go-to string. When I had a Warwick Corvette Standard with active MECs, the Silencers were excellent to tone down the harsh, peaky highs of the MEC electronics. When I had that bass "de-active-ated" and replaced the electronics with passive Duncans and a V/V/T setup, the Silencers were too wooly.
And, yeah, GHS strings generally tend to feel stiffer and have higher tension numbers than the competition. If you're used to the supple feel of Pure Blues, even GHS Balanced Nickels (also a round core string) will feel stiff, given the differences in core design.
Those who love GHS PWs absolutely LOVE them to the moon and back. Those who don't... don't. Still, they are worth trying. Strings are the cheapest and easiest way to try something new with an instrument. I'm notorious for being "gotta try 'em all" with strings (I call it string-pokemon). And I'm still looking for my "one."