Easy being a relative term, I would rate this mode at medium/easy. Of course, I didn't mount the paddles to the wheel - I just installed the wheel, switch, and wiring harness. Took my about 2 hours total taking my time. The most difficult parts are separating the top & bottom portions of the steering column (getting them back together was almost as difficult) and pulling the HVAC controls out of the dash board. Once everything was apart, routing the wires was fairly easy.

Here's the info on the wheel itself from RealOEM. Macon BMW ordered it for me from Germany as it's not a US wheel and I was able to use my sport airbag that came with the vehicle.

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'08 335i Coupe - Barbera Red / Saddle Leather / Light Poplar Wood / 6spd Manual
Options: Sport, Premium, Cold Weather, Comfort Access, Active Steering (awesome!), Power Rear Shade, IPod Adapter, Navigation w/IDrive
Mods: M6 Wheels, Split Armrest, M-Steering Wheel, Euro Light Switch w/Rear Fog Lights, Short Shift Knob w/Matching E-Brake Handle, Clear Reflectors, CDV, Clear Bra

Retired:'04 X5 4.4i