i did a few 600 miles trips to the Ardennes when i got the GSA last July and it it was painful on the stock seat, so a brought the Low version in September for my trip to the Central massif.
It was a life saver and with the Low version there is not much difference to the stock seat height due to it being wider, but its much more comfy.
One very notable point though is that the stock seats are now
not same between the GS and GSA as in previous models so are not interchangeable with the Sargent, so the front sargent does not fit properly with the rear stock seat so you need to buy both sargents.
Looks nice fitted