I have one and have not used it for years. At first it was the greatest thing since sliced butter. Then other tools have started taking its place. The accuracy and depth of cut became a bigger issue to me with the portaband.
My need for portable bandsaw work has diminished, that or I do it with other tools.
A cold cut saw is awesome, and I need/want a new one.
All depends on what you are looking to cut and where.