I have a love/hate relationship with my drimaster 2, it is great at some things but quite frankly the design leaves a lot to be desired.
The most annoying thing is the way it whistles like a steam train when not touching the fabric, it's a horrendous sound and quite embarrassing! Also the metal slots can catch the loops on some fabrics, which I found out the hard way once.
That said, it really does knock spots of a standard hand tool when you're ploughing through acres of cushions and all the flat parts of a suite.