OK, after having the Elise steering wheel on my 1994 S4 for a week or so can comment a bit on it and the install..
Installation instructions: Are very easy to follow and explicit
Installition itself: Pretty easy actually as long as follow the instructions. Only PITA was getting the connector under dash on driver side disconnected. Highly recomend a mirror for location and undoing it. MUST use a torque wrench for the nut that holds the adapter; I over tightened mine a bit and it cinched down to point to binding. Undid, corrected, solved.
In Use: WAY better than OEM steering wheel, while the smaller size does increase effort it is very, VERY minor. The smaller size does block the top of the tach and speedo a bit but not that big of a deal really. Is easier to get in and out of the car due to smaller size as well.
And it looks MUUUUUUUUUUUUUUUUUUUUUUUUCH better too!