On a bad day, it's all the weight of DH tyres/wheels without the grip. On a good day, it's all the simplicity of rigid with a bit of give.
I certainly wouldn't buy one unless you plan to ride in snow or sand. The tyres are designed for long distance on soft surfaces so they don't have much in the way of side knobs. Leaning the bike over gets you very little grip. All the mods for fat tyres make kit choice difficult… Special tyres at £85 each, only two BB choices I know of (Surly, or FSA), two rear hubs, rear brake calipers at both ends.
In the UK, I rode the Dyfi Enduro, all of Afan, a multi-day Welsh bivvy ride, and lots of local trails on it. So its all do-able, but most of the time a normal hardtail is more fun/easier. OTOH, I also rode it in Alaska and Finland and floated past people with mere 2.5" tyres.
