I've got these tyres on my BMW.
On road I can confirm they are a good tyre with great wet/dry grip stability with a positive quiet feel that inspires confidence
Off road use for me has been some byways, mainly gravel, some light mud and puddles, they seem pretty capable under these conditions but I'm no expert off-roader, I'd say anything more than that you'd be stuck.
Longevity wise it's hard to say, it depends how you use your bike but for myself I'm a around 2k in and they seem to be holding up well for a relatively soft tyre.