I have the tkc80's. I don't know what you have read about them but from my experience they are pretty good.

The contis have bags more traction offroad than the OEM Saharas my bike came with. I can wheelie in the dirt (sometimes) and they grip the road quite well in both wet or dry. (They seemed to have more grip than my old Saharas under heavy rear brake)

They are not really meant for high speed and they have been known to develop a weave above leagal speeds.
You can reduce this by adding one notch of preload to your rear shock. When travelling two up I have not noticed any weave, but I have had the front wheel let go a couple of times, but only on very tight corners and at silly lean angles (and low speeds, thankfully for my underwear).

The other thing that can be unnerving is they turn into corners quite fast. I have heard it explained as the "Edge of the cliff feeling". You will know what I am talking about when you get them fitted. Don't worry about it. You get used to it (I find it exciting).

The rears wear faster than most but that is the price you pay for grippy nobbys.

Enjoy!

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