I just put WRs (not the G2) on my Wrx before the snows...absolutely no complaints...on a rough car like the REX, there is very little compromise to speak of...very very slight squishiness compared to the stock W-rated Potenzas.
Size is 215/45VR17, $220 each...still a blast going (real) fast. They are not supposed to last that long, maybe a couple of years. They are no worse in the snow than any 'dedicated' winters that are performance orientated.
I also have WRs on the Sienna, second winter now, noticeably noisier than the OEM and some occasional vibrations, the van handles better though because the WR is R-rated. They wear fast as well, I think maybe good for 50,000km (?guaranteed for 100,000).
First year use was was as good as other dedicated winter tires, second year use is like used winter tires LOL! Still much better than 'No seasons'.
The only instance I would consider dedicated sets would be if I'm starting with new stock/summer tires, but I would probably be getting dedicated rims for the winter tires...