I fitted my SWM front and passenger kits today. Took about 4 hours in all.
Overall I'm chuffed. I wouldn't say it's game changing - it's only about 3cm after all - but definitely a noticeable improvement in driving position for me. Much better for passengers too - puts the passenger seat about where the driver's used to be at its lowest.
Driver's side went really smoothly, no problems at all.
The passenger side was much more fiddly owing to the tilt-slide mechanism. I also had a small tolerance problem on the front left of the upper mounting plate and had to cut a little notch out of it with a hack saw.
No biggie though and overall the kit does what it says on the tin. As others have said, there's superfluous trim afterwards but nothing damaged or cut so can easily go back to OEM.
According to my bathroom scales (that I've always assumed over-read

, 8kg a side excluding the handles and nuts & bolts.
Before
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After
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Tolerance problem
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Thanks hack saw
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Superfluous bits
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