It's a bit hard, but not very. The key is for all but the captain to forget they're on a bike once it's going. You also have to get used to the larger turning radius which makes steering sluggish. The slow steering response at low speed will make balance harder until you get up to speed, so practice in a parking lot until you get used to the handling.
Starting out from stop can be harder and may remind you of when you first learned how to ride a bike. Depending on the riders, it might help to have the middle rider hold the bike vertical while the others put their feet on both pedals and get it rolling.
__________________
FB
Chain-L site
An ounce of diagnosis is worth a pound of cure.
Just because I'm tired of arguing, doesn't mean you're right.
“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN
WARNING, I'm from New York. Thin skinned people should maintain safe distance.