Admittedly I've only had them on for about a year, but really really good.
I'd previously bought bearmach 'oe' springs and they were crap, they rusted severally within a year, and then showed signs of sagging after a couple. Stupidly I replaced with britpart which sagged within a year (I do tow a fair bit of weight regularly) but even so I was annoyed. Flatdog are a British company and have quite a good reputation, a chap on here (@300bhp/ton )recommended them and I can't falt them at all! I didn't contact them though, I just ordered online.
