I've got two wire bead versions, one a single ply 2.3 60a and the other a dual ply 2.5 42a.
I'm used to Kenda tyres and for a given size I find that the Highrollers are skinnier and maybe a little heavier. But the extra weight is clearly visible in the thicker sidewalls and more sturdy carcass.
I only use Highrollers on the back and compared to a Kenda Nevegal DTC I find that they're probably a bit more predictable at the greasy end of the scale. The tread is much more pronounced so in softer ground this gives an appreciable chunk of extra grip.
On the down side, on really dry and rocky descents I find that the rigidty of the tyre carcass can become wearing.
In terms of the tread, it's OK but I reckon a Nevegal climbs better. The 60a compound seems a pretty handy compound for most conditions and the 42a is for DH only. It's so sticky that it's like riding with the brakes on – it's almost too sticky.
However, I have found that the 42a is far more durable than Kenda's Stick-E compound, yet seemingly as grippy.
So all round, I'd rate Highrollers as pretty handy tyre.