PowerStore Admin looks excellent, although I have not ever implemented PowerStore on a 'working' site.
I would not use the available front-end designs, as they all seem a bit Janet and John to me - a bit indelicate - a bit clunky (for my taste) - and also lacking any facility for 'real' design changes - the kind that a client might require as a fit for their existing website/corp image. They all seem to be 'of a kind'.
Tempting though. But instead I am wading through DataAssist and eCart (plus the rest) to produce what is probably a less efficient, less integrated solution.
I thought that design possibilities that hopped outside of the WebAssist mould would be easily possible and supported too.
You can't mistake a PowerStore site when you see one, which would be fine if there were just a handful of them out there, but none of the designs are entirely to my taste - or as yet to a client's taste.
My humble opinion.