The FC-UFO has become my daily driver, solo or in a group it gets the job done. I use it almost exclusively with a whip. Check it out, like the FC-187 v2 is also produced by Steven.
Do yourself a favor - toss the supplied tubing & order yourself tubing from another source. Silicon tubing coming from china tastes just like silicon tubing from China
and we don't want to taint the lovely taste of herb. You could use 7th Floor (SSV, DBV tubing) fitting it over an M2M adapter. Or any food-grade tubing off of Amazon. I accidentally ordered the wrong size tubing for use with my DBV. As luck would have it, my mistake fit snugly over the whip adapter included with the UFO. SCORE!
But back on track the UFO works good between two on a couch.
You can place it on a table right in front of the couch or on the middle cushion between you two. It's a hefty, sturdy piece of glass & as long as your couch cushion sits level should have no problems.
http://www.dhgate.com/product/2015-new-16-5cm-height-glass-bong-based-water/233447446.html