I have one - not used it much as I am more of a dressmaker than textile artist and always have loads of sewing projects lined up.
I think textile and fibre art type projects are where a machine like this comes into its own.
The last project I did with mine was to make some fabric which I then made into a weekender bag as a gift for a friend. I used the embellished fabric together with a salvaged ruby red leather
It was a boring quite stiff plain ruby red wool blend and I made a random, winding path path design on it with burgundy and sandy gold bobbley yarns. It made a lovely texture.
The video shows the same way I used the embellisher to meld the yarns into the fabric rather than couching it down on the sewing machine.
https://pin.it/gPDI1utIt was huge fun but makes a lot of noise.
Other than that I've played with making textured bits and pieces that I gave to someone I know who is very clever with applique and piecing bits into amazing creative projects.
On her embellisher, this year she has been making paired hearts for her local hospital.