My personal experience......needed new tailgate struts,settled on SGS.....initially very slow,partial lifting of the tailgate.
Maybe it’s the cold methinks.....weathers better now,10 degrees plus and no change.....one headache later induced whilst raining and me forgetting the tail only partially opens with the new struts..........get online and order OEM struts.
Moral of the story.......you gets what you pay for

Hi,
I would get back in touch with who ever you bought them from, its a while ago but remember the name from when I changed mine and ISTR they were fine, no issues at all

 Porsche Cayenne 2022
gone Porsche Cayenne 2020
gone Corris Grey HSE Dynamic 2016
gone Ipanema HSE lux 2010
gone Rimini HSE 2005
!!

Thanx for the advice,i'll give it a go ......just bloody frustrating when you buy a product and have to go through a to and fro process to hopefully get what you thought you bought in the first place.