Yes i would and i have. Got a OO Fatty back in May but having been off the bike injured Feb-Oct only had my first ride last weekend.
Took it to Glentress which is not where i had planned to ride it when i bought it, unless snowy, but as it was only my second ride in 9 months and i was desperate to try it i decided on GT so i could bail out if necessary.
It is about 10lb heavier than my other bikes but i don’t think it felt that much heavier when riding particularly uphill and even in my current unfit state it climbed better than i thought it would.
The grip is massive as you would expect from tyres that size and it coped pretty well with everything i came across at GT. I found it a huge amount of fun to ride more so than i expected, although having been off the bikes for a while there was possibly an element of just being back riding euphoria involved, second ride may be more telling.
Quite a lot of folk did comment/ask questions but nobody said anything negative, at least not to my face, and most appeared genuinely interested in how it rode.
I would certainly recommend folk try one, they may just suprise you.