Pros:
*(Subjectively) My favourite car in the history of for evaaaaaaaaaaaaa.
*Amazing torque and high speed stability.
*(Subjectively) Looks astonishing.
*It's quite a historical car.
*It will teach you a thing or too about throttle control. Or kill you in the process.
*(Subjectively) Though not extremely accurately modelled, the sound is still pretty amazing.
*(Subjectively) It's an Audi!

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Cons:
*Slower than all of the other LMPs. Strange, given that it was only slower than the Peugeot 908 HDi, and that from like 2008 only. It's odd that it's outpaced by the R8s and the Pescarolos, because with all due respect to them, the R10 is faster. And it's not me who says it, it's the fastest lap they posted at Le Mans. Terrible mistake by PD.
*Very expensive addition to your collection. But, if you're a fan of Audi and Le Mans this won't be an issue.
*Gearbox is, at least to me, messed up. That's PDs doing there again

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My 2 cents.