Guaranteed, you put any of those three girls on that Harley and you will see a "funny" crash. Even the guy riding it has to be careful where he places his feet. That "Big Boy" is not like a whole trailer tailgate.
Then there are other issues. Notice the hold-in straps attached underneath. You have to crawl down under that thing after setting it up and fasten the straps. I have seen that before. After a use or two it's such a pain you don't do it.
Folding that thing up lengthwise and then across means it's just a question of time before you smash a finger or two in the mess.
Of course, that curved shape is good for ground clearance under the bike going over the tailgate - as long os the cables or linkage does not break as it did on my Duramax. Tailgate crashed down and I was dumped in a heap at a truckstop in New Mexico. Remember that well.
Oh, where you gonna store that thing? It does not fold flat but if it did, you still have to put it somewhere. Where is that "somewhere" you are going to get the workout storing the thing. Be careful a bump does not throw it out so tie the darn thing down.
Been there. Done that decades ago. Except for a breakdown where my Harley came home on a truck I flagged down back in the 70's, I would not do that again.
They also don't give you that contraption for nothing. Add a little more coin and get a small 5 x 8 trailer.Then if those little girls have nothing to do, send them my way.