Has anyone fitted a rear spring kit in the last 12months

[bassman1]

and purchased them from well known online morris parts suppliers ,If so how are they performing , do you have high usage, are they sagging already , i'm asking because i see lots of threads about parts being fitted and people say they'll report back and thats where the thread ends ....with no report back, as i am in need of spring replacement and had recommendations and prices quoted from the reasonable to the less than reasonable , i would like to know how you the purchaser and user got on , maybe a myth can be buried,a suitable point made to suppliers and ultimately on the selfish side maybe i wont waste money or get fleeced along the way , hopefully i can get some kind of reply asap , ta for reading