If you managed to enjoy first tracks in deep snow, you'll love everything else about fat bikes. It doesn't get much slower or more painful than that. Next up try downhill- rumbling past an Enduro bike on a sandy blown out blue trail is special kind of satisfaction :)
Those wheels are excellent, but a b* to set up tubeless. Fill all the little drain holes in the bead seats with something (caulk, silicone, epoxy, bubble gum...) before you try.
Blue-stripe Schwalbe Jumbo Jims set up tubeless roll faster than many trail tires. On tight or sandy trails a fatty on those can be quicker than an XC race bike.