Take it from someone who has gone the hard road . . . .
Go directly to a Fulcrum dealer, order a set of SS or if you really want a set of Flex's.
Pro's
Affordable
Great
Adjustable
Con's
cost a bit more than Koni's/Kings or Koni/Eibach (The better package) <<< ride height is either out of the box or what a very knowledgeable suspension guru will get you (read more $$$'s)
none, see above.
Organise a dodgy day, by the time the first set of sausages are burnt the rears should be done, allow about 2-3 hours for the fronts, only cause there's a few more things to unbolt to get to them.
I can do the whole car in about 4 hours on my own, taking my own sweet time to recheck everything is bolted back on and tight.
Wheel alignment the next day and all is good.
Point of note, always wind the Teins to full hard and then back to where you want them (It's in the manual) I run 10 all around on a daily drive, resist the urge to try +/- front rear too, the BOV effect only gets the car see-sawing through corners, which isn't pleasant.
per NMX516/8's comments the SP swings about 60 extra Kg's over the nose, something a non adjustable package will have issues with.
per widdle itsy bitsy Unicorns comments, what did he say again

Went for a drive and there were slow cars everywhere, why are NC's so common . . . must be NC = Normally Cardiganed.