Had mine on for a year and two months now.
They still look like the day I bought them, and i've got nothing but good to say about their performance. Stick to the road like glue in the rain and dry. Haven't had any snow yet, so I can't tell you how they do there (but i hear they are awesome, as usual).
The little bit of muddin i've done with them has also yielded excellent results.
Congrats on the purchase. It was one you will not regret!