Background: My GIVI E-46 box, made 1998, served on over 10 new bikes/scooters, served in Europe/Asia/North America. Probable miles 4-500,000. Hole cut in top for dog head to come thru about 15 years ago and some vent holes made in recent years since living in South.
The box at time of purchase, had lights which lasted about a year, document holder which fell apart/off about the time----all useless junk in first place. Top retain strap fell off, too, replaced with leather lace.
I use GIVI rack on bike=no troubles, check bolts now and then. For all bikes/scooters it has been used on, I drilled hole thru rear bottom of box/rack. and added security bolt with wing nut for quick box removal.
SilverWing: Box very handy, stable....at highway speeds, but at slow speeds, the weight being high/above and to rear of rear axle center-----You feel it and need to pay attention---bike in my opinion top heavy feeling without box or other bags on passenger seat. Over the years I have added reflectors/decal on back made up by SIGN shop in black/yellow--"CAUTION--OLD FART"-----I believe everyone over 60 should have this on all their vehicles as warning.
Black finish remains nice, treated with stuff for plastic bumpers now and then.
2014 I rode with SilverWing to 46 states-box worked fine, 3 more states with my Suzuki TU 250 ($8.95 Homer Box from Home Depot)
Box appears to be good for another 10-15 years.
Un-usual for motorcycle accessories---the GIVI stuff works/fits and lasts a long time.