Has anyone any experience of fitting 255/55/20 Grabber ATs onto the new RRS?

They claim 50/50 off-road/on-road so any thoughts on road noise or whether the "H" rating matters would be welcome before I commit.

It seems there is no other off road tyre choice for this size of wheel and so I intend fitting the GG for next winter. My son has them on his Freelander and they coped very well with last winter's wet and muddy conditions but I think they will struggle with any really serious conditions. As I have said before on this site the Goodyear Wrangler Duratrac (MT) is no longer marketed in this size in the UK but there are still some left but I will not risk it as replacements could become impossible to find.
Please let me know if you find any other off road tyre in this size.

The Grabber AT, in 255/55/19 at least, has proved to be a decent all round tyre. Goes well off road even in muddy conditions. Can be a bit noisy on tarmac as it wears, however. Not the toughest tyre around either as it seems to be prone to stone damage. However, on balance it is a good AT tyre. On my RRS1, it hasn't left me stuck: I would think that coupled with RRS2's more up to date systems it would be even better.  2012 SDV6 - it's missing a couple of cylinders
2008 TDV8 - it was a labour of love and is much missed

Thanks for the thoughts. I need to change but when there's only one choice (I've found nothing else) I get nervous.

Will update when they've had a bit of use (or earlier if the tractor has had to come out...).