I've just poly bushed my Si, used the Deflex kit.

The Ford bushes are a nightmare to get out, the rear ones took me about 3 hours each and the fronts about 3 hours per wishbone. Once the old bushes are finally out, fitting the polybushes is easy. They all fit exactly as they are supposed to, took no time at all to put the new ones in.

Not driven it yet, but impressed with the way they fit