I have one & really like it. I have only quilted 86 inches wide & think that's my max. Of course I have thought about quilting borders & then adding that to the main quilt.
About the pvc falling off the table. I use a pencil taped to the table close to the edge so it doesn't fall off. He suggests doing it on his website. I watched the video numerous times & started with a quilt for my dog, not too big & so what if it's not perfect. Next I quilted a lap quilt for my MIL Wish I had practiced more first but it turned out very pretty. Each one gets easier.
If you hand quilt it works really well. I also like that I can have different sizes of pipe & have several quilts framed up & ready to quilt.
I bought mine used & got it cheap so I might be more flexible about it but there are other threads on her that have a few people who like the frame. More people dislike it than not.
Sorry, that went on forever! LOL
Jo