Hi Eon, not sure if this helps. I purchased one for my Adv at the bike show in Nov. I ordered the 'low' version and it arrived in a couple of weeks. When I fitted it it wasn't much lower than the standard Bm seat so I sent it back. (I am not convinced that it was an actual low version even though it had the relevant sticker)
The journey I tested it on proved to be more comfortable than my Bm low seat.
The quality seemed good as did the fitting. The only thing I would say is that as a one piece seat, it only secured itself on the passenger locking fixing and not also on the riders locking fixing. Not sure if there is any relevance to the security overall.