I don't use SF much these days, for two reasons: as an occasional
DIYer I don't often need to buy £40 of stuff, so I do not qualify for
their free delivery, whereas I can quite easily find £10 of stuff to
buy from TS.
I have been disappointed by SF's customer service. There have been
quite a few posts here about this recently, so it seems I am not the
only one. As an example: I posted two returns back to them and they
claimed that they had received neither, contrary to what the tracking
information said, and it took quite some time before they gave me a
refund.
I used to use SF's quicksilver screw, which IIRC they advertised as a
general purpose screw. It is a double threaded screw. I have never
quite understood the difference between single and double threaded
screws. I believe double threads can be pulled out easier; is that
because the threads are closer together? But they say a double thread
drives in easier so perhaps it is all swings and roundabouts or
perhaps I should buy single thread screws next time?
Anyhow, the quicksilver were ok for my modest uses, except when I used
them near the end of a piece of wood, e.g. a floorboard, when the wood
would split. I bought the reisser screws precisely because they said
they did not split and that claim seems to be true in my experience so
far. I haven't used large quantities and I still use the quicksilver
for everything else, but so far I am a happy customer of the reisser.
I have never used turbo gold so can't say how they compare. In what
way do you think reisser are better?